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Intel RST driver -> SSD bug ?

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  Intel RST driver -> SSD bug ? "A. Kapetanovic" <aka@alphanet.ch> - 2020-10-20 22:30 +0200
    Re: Intel RST driver -> SSD bug ? David Christensen <dpchrist@holgerdanske.com> - 2020-10-21 06:10 +0200
      Re: Intel RST driver -> SSD bug ? "A. Kapetanovic" <aka@alphanet.ch> - 2020-10-21 19:30 +0200
        Re: Intel RST driver -> SSD bug ? "Alexander V. Makartsev" <avbetev@gmail.com> - 2020-10-21 23:30 +0200
          Re: Intel RST driver -> SSD bug ? "A. Kapetanovic" <aka@alphanet.ch> - 2020-10-22 12:00 +0200
        Re: Intel RST driver -> SSD bug ? David Christensen <dpchrist@holgerdanske.com> - 2020-10-22 05:00 +0200
          Re: Intel RST driver -> SSD bug ? "A. Kapetanovic" <aka@alphanet.ch> - 2020-10-22 12:10 +0200
            Re: Intel RST driver -> SSD bug ? David Christensen <dpchrist@holgerdanske.com> - 2020-10-23 04:30 +0200
              Re: Intel RST driver -> SSD bug ? "A. Kapetanovic" <aka@alphanet.ch> - 2020-10-23 06:50 +0200
                Re: Intel RST driver -> SSD bug ? David Christensen <dpchrist@holgerdanske.com> - 2020-10-24 03:10 +0200
                  Re: Intel RST driver -> SSD bug ? "A. Kapetanovic" <aka@alphanet.ch> - 2020-10-24 19:00 +0200
                    Re: Intel RST driver -> SSD bug ? David Christensen <dpchrist@holgerdanske.com> - 2020-10-24 19:50 +0200
                      Re: Intel RST driver -> SSD bug ? Cindy Sue Causey <butterflybytes@gmail.com> - 2020-10-24 20:20 +0200
              Re: Intel RST driver -> SSD bug ? "A. Kapetanovic" <aka@alphanet.ch> - 2020-10-23 07:10 +0200

#228038 — Intel RST driver -> SSD bug ?

Hi,

I have a problem with my laptop, it looks like a SSD bug : some parts in a  
file vanishes (a function in a perl program). I have an asus laptop which  
uses intel RST technology (Rapid Storage Technology), and I wonder if the  
problem can come from that.

Does someone have an unlucky experience with RST please ?

Amer

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#228054

On 2020-10-20 12:58, A. Kapetanovic wrote:
> Hi,
> 
> I have a problem with my laptop, it looks like a SSD bug : some parts in 
> a file vanishes (a function in a perl program). I have an asus laptop 
> which uses intel RST technology (Rapid Storage Technology), and I wonder 
> if the problem can come from that.
> 
> Does someone have an unlucky experience with RST please ?


If you think your SSD is dying, backup your data and be sure to preserve 
old backups.


Intel hardware RAID is best supported on Windows -- install a driver 
that includes an administration GUI, and you can see what the hardware 
is doing.


I now use ZFS exclusively for RAID.  This means I need to set the disk 
drive mode to AHCI in the motherboard firmware.


Are parts of your Perl program disappearing?  If so, describe the steps 
required to reproduce the bug and view the effects.


Are parts of a file accessed by your Perl program disappearing?  If so, 
describe the steps required to reproduce the bug and view the effects.


Do you have a test suite for your Perl program?

     https://www.perl.org/about/whitepapers/perl-testing.html


Create a test script that elicits the bug.  Then, move your Perl program 
and test script to another machine without RST and run the test script. 
That should tell you if you have an issue with your Perl program or an 
issue with RST.


David

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#228076

David Christensen writes:
>
> If you think your SSD is dying, backup your data and be sure to preserve old backups.

That's done. My laptop is quite new (2 months old), Asus.

>
> Intel hardware RAID is best supported on Windows -- install a driver that includes an administration GUI, and you can see what the hardware is doing.

I used smartctl, short and long test. Both seems to be OK (the shell is at  
the end of this message), but one strange thing : both test are finished  
quite at the same I run them.

I will look for a driver that includes an administration GUI, I have no  
knowledge about.

>
> I now use ZFS exclusively for RAID. This means I need to set the disk drive mode to AHCI in the motherboard firmware.

Can this filesystem help me ?

>
> Are parts of your Perl program disappearing? If so, describe the steps required to reproduce the bug and view the effects.

Look this shell :

amel@laptopasus:~/fp/test.algoB$ perl -c algo-B1.pl
algo-B1.pl syntax OK
amel@laptopasus:~/fp/test.algoB$ ./algo-B1.pl
2020-01-01 - 2020-08-31
amel@laptopasus:~/fp/test.algoB$ ./algo-B1.pl
2020-01-01 - 2020-08-31
amel@laptopasus:~/fp/test.algoB$ ./algo-B1.pl
Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.

I didn't change anything in algo-B1.pl between these shells. Some hours  
before that, I had the same problem : a function of algo-B1.pl vanished,  
I'm not sure, It is very possible it's the same.

>
> Are parts of a file accessed by your Perl program disappearing? If so, describe the steps required to reproduce the bug and view the effects.

This program access a postgresql database, impossible for me to say  
something, the main table has millions of records, the little tables are ok.
>
> Do you have a test suite for your Perl program?
>
>     https://www.perl.org/about/whitepapers/perl-testing.html
>
> Create a test script that elicits the bug. Then, move your Perl program and test script to another machine without RST and run the test script. That should tell you if you have an issue with your Perl program or an issue with RST.

I will take a look of perl-testing.html ; bu there, I have only my laptop...

# sudo smartctl -i /dev/nvme0n1p5
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-48-generic] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Number: SAMSUNG MZVLQ512HALU-00000
Serial Number: S4Y4NF0N221020
Firmware Version: FXV7000Q
PCI Vendor/Subsystem ID: 0x144d
IEEE OUI Identifier: 0x002538
Total NVM Capacity: 512’110’190’592 [512 GB]
Unallocated NVM Capacity: 0
Controller ID: 5
Number of Namespaces: 1
Namespace 1 Size/Capacity: 512’110’190’592 [512 GB]
Namespace 1 Utilization: 163’637’571’584 [163 GB]
Namespace 1 Formatted LBA Size: 512
Namespace 1 IEEE EUI-64: 002538 a201b2a36d
Local Time is: Tue Oct 20 19:29:46 2020 CEST

# smartctl -t short -a /dev/nvme0n1p5
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-48-generic] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Number: SAMSUNG MZVLQ512HALU-00000
Serial Number: S4Y4NF0N221020
Firmware Version: FXV7000Q
PCI Vendor/Subsystem ID: 0x144d
IEEE OUI Identifier: 0x002538
Total NVM Capacity: 512’110’190’592 [512 GB]
Unallocated NVM Capacity: 0
Controller ID: 5
Number of Namespaces: 1
Namespace 1 Size/Capacity: 512’110’190’592 [512 GB]
Namespace 1 Utilization: 163’676’123’136 [163 GB]
Namespace 1 Formatted LBA Size: 512
Namespace 1 IEEE EUI-64: 002538 a201b2a36d
Local Time is: Tue Oct 20 19:30:07 2020 CEST
Firmware Updates (0x16): 3 Slots, no Reset required
Optional Admin Commands (0x0017): Security Format Frmw_DL Self_Test
Optional NVM Commands (0x005f): Comp Wr_Unc DS_Mngmt Wr_Zero Sav/Sel_Feat  
Timestmp
Maximum Data Transfer Size: 512 Pages
Warning Comp. Temp. Threshold: 82 Celsius
Critical Comp. Temp. Threshold: 85 Celsius

Supported Power States
St Op Max Active Idle RL RT WL WT Ent_Lat Ex_Lat
  0 +     4.83W       -        -    0  0  0  0        0       0
  1 +     3.54W       -        -    1  1  1  1        0       0
  2 +     3.04W       -        -    2  2  2  2        0     500
  3 -   0.0500W       -        -    3  3  3  3      210    1200
  4 -   0.0050W       -        -    4  4  4  4     1000    9000

Supported LBA Sizes (NSID 0x1)
Id Fmt Data Metadt Rel_Perf
  0 +     512       0         0

=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SMART/Health Information (NVMe Log 0x02)
Critical Warning: 0x00
Temperature: 15 Celsius
Available Spare: 100%
Available Spare Threshold: 10%
Percentage Used: 0%
Data Units Read: 1’870’127 [957 GB]
Data Units Written: 1’946’807 [996 GB]
Host Read Commands: 15’019’221
Host Write Commands: 26’951’451
Controller Busy Time: 699
Power Cycles: 152
Power On Hours: 68
Unsafe Shutdowns: 27
Media and Data Integrity Errors: 0
Error Information Log Entries: 66
Warning Comp. Temperature Time: 0
Critical Comp. Temperature Time: 0
Temperature Sensor 1: 15 Celsius

Error Information (NVMe Log 0x01, max 64 entries)
No Errors Logged

# smartctl -t long -a /dev/nvme0n1p5
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-48-generic] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Number: SAMSUNG MZVLQ512HALU-00000
Serial Number: S4Y4NF0N221020
Firmware Version: FXV7000Q
PCI Vendor/Subsystem ID: 0x144d
IEEE OUI Identifier: 0x002538
Total NVM Capacity: 512’110’190’592 [512 GB]
Unallocated NVM Capacity: 0
Controller ID: 5
Number of Namespaces: 1
Namespace 1 Size/Capacity: 512’110’190’592 [512 GB]
Namespace 1 Utilization: 163’676’155’904 [163 GB]
Namespace 1 Formatted LBA Size: 512
Namespace 1 IEEE EUI-64: 002538 a201b2a36d
Local Time is: Tue Oct 20 19:31:01 2020 CEST
Firmware Updates (0x16): 3 Slots, no Reset required
Optional Admin Commands (0x0017): Security Format Frmw_DL Self_Test
Optional NVM Commands (0x005f): Comp Wr_Unc DS_Mngmt Wr_Zero Sav/Sel_Feat  
Timestmp
Maximum Data Transfer Size: 512 Pages
Warning Comp. Temp. Threshold: 82 Celsius
Critical Comp. Temp. Threshold: 85 Celsius

Supported Power States
St Op Max Active Idle RL RT WL WT Ent_Lat Ex_Lat
  0 +     4.83W       -        -    0  0  0  0        0       0
  1 +     3.54W       -        -    1  1  1  1        0       0
  2 +     3.04W       -        -    2  2  2  2        0     500
  3 -   0.0500W       -        -    3  3  3  3      210    1200
  4 -   0.0050W       -        -    4  4  4  4     1000    9000

Supported LBA Sizes (NSID 0x1)
Id Fmt Data Metadt Rel_Perf
  0 +     512       0         0

=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SMART/Health Information (NVMe Log 0x02)
Critical Warning: 0x00
Temperature: 14 Celsius
Available Spare: 100%
Available Spare Threshold: 10%
Percentage Used: 0%
Data Units Read: 1’870’127 [957 GB]
Data Units Written: 1’946’817 [996 GB]
Host Read Commands: 15’019’221
Host Write Commands: 26’951’743
Controller Busy Time: 699
Power Cycles: 152
Power On Hours: 68
Unsafe Shutdowns: 27
Media and Data Integrity Errors: 0
Error Information Log Entries: 66
Warning Comp. Temperature Time: 0
Critical Comp. Temperature Time: 0
Temperature Sensor 1: 14 Celsius

Error Information (NVMe Log 0x01, max 64 entries)
No Errors Logged

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#228087

[Multipart message — attachments visible in raw view] — view raw

On 21.10.2020 22:21, A. Kapetanovic wrote:
> David Christensen writes:
>>
>> If you think your SSD is dying, backup your data and be sure to
>> preserve old backups.
>
> That's done. My laptop is quite new (2 months old), Asus.
>
Could you tell us exact model of your laptop?
What type of filesystem do you use?
Is it possible dataloss was a consequence for unexpected laptop freeze
or shutdown or power loss or failed sleep\hibernation?
I've looked up your SSD on Samsung web site and it appears to be EoL
already. As usual ASUS build their ultra modern laptops from outdated
previous gen scrap parts.
And of course Samsung being all hush-hush about exact specifications for
their SSD products, not even telling NAND type.
You can try to search ASUS support web site for a possible firmware
update for your SSD. Not so long ago, SSDs with poorly written\tested
firmwares had similar symptoms like partial data loss or worse.
There is a quite recent firmware update for your SSD (PM991), but from
Dell [1] and from Lenovo [2]. I'm not really sure if it will install on
ASUS product, but even its existence is a good sign.

[1]
https://www.dell.com/support/home/en-ca/drivers/driversdetails?driverid=7mm5c&lwp=rt
[2] https://pcsupport.lenovo.com/us/en/downloads/ds119265

-- 
With kindest regards, Alexander.

⢀⣴⠾⠻⢶⣦⠀ 
⣾⠁⢠⠒⠀⣿⡁ Debian - The universal operating system
⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org
⠈⠳⣄⠀⠀⠀⠀ 

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#228099

Alexander V. Makartsev writes:
>
> Could you tell us exact model of your laptop?

ASUS VivoBook 15 X512JA
>
> What type of filesystem do you use?

ext4
>
> Is it possible dataloss was a consequence for unexpected laptop freeze
> or shutdown or power loss or failed sleep\hibernation?

I never note such a thing.
>
> I've looked up your SSD on Samsung web site and it appears to be EoL
> already. As usual ASUS build their ultra modern laptops from outdated
> previous gen scrap parts.

I never thought that before for ASUS, it's an important information for me.  
What should have have bought ? Lenovo ? Something else ?

Thanks :)

Amer

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#228096

On 2020-10-21 10:21, A. Kapetanovic wrote:
> David Christensen writes:

>> Intel hardware RAID is best supported on Windows -- install a driver 
>> that includes an administration GUI, and you can see what the hardware 
>> is doing.
> 
> I used smartctl, short and long test. Both seems to be OK (the shell is 
> at the end of this message), but one strange thing : both test are 
> finished quite at the same I run them.

'smartctl -t ...' starts a test in the background.  Short tests can take 
seconds or minutes to complete, depending upon the drive.  Long tests 
can take minutes or hours.  Monitor progress with 'smartctl -x ...' (I 
prefer '-x' rather than '-a').  See below.


> I will look for a driver that includes an administration GUI, I have no 
> knowledge about.

I meant that Intel provides RAID drivers and tools for Windows:

https://downloadcenter.intel.com/product/55005/Intel-Rapid-Storage-Technology-Intel-RST-


Intel supports Linux through open-source software:

https://software.intel.com/content/www/us/en/develop/topics/open-source.html


>> I now use ZFS exclusively for RAID. This means I need to set the disk 
>> drive mode to AHCI in the motherboard firmware.
> 
> Can this filesystem help me ?

Yes, but ZFS is not supported OOTB on Debian.


Given a single 512 GB SSD, I would use the Debian installer and put 
Debian into the first ~14 GB using ext4.  Once the system is up, I would 
install the ZFS packages:

zfs-dkms
zfsutils-linux


Then, create a partition using the rest of the SSD.


Then, create a ZFS pool using that partition with the options:

-O compress=lz4
-O atime=off
-O copies=2


Now you can add ZFS filesystems and/or volumes as desired, such as for 
/home or for PostGreSQL.


>> Are parts of your Perl program disappearing? If so, describe the steps 
>> required to reproduce the bug and view the effects.
> 
> Look this shell :
> 
> amel@laptopasus:~/fp/test.algoB$ perl -c algo-B1.pl
> algo-B1.pl syntax OK
> amel@laptopasus:~/fp/test.algoB$ ./algo-B1.pl
> 2020-01-01 - 2020-08-31
> amel@laptopasus:~/fp/test.algoB$ ./algo-B1.pl
> 2020-01-01 - 2020-08-31
> amel@laptopasus:~/fp/test.algoB$ ./algo-B1.pl
> Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.
> 
> I didn't change anything in algo-B1.pl between these shells. Some hours 
> before that, I had the same problem : a function of algo-B1.pl vanished, 
> I'm not sure, It is very possible it's the same.
> 
>>
>> Are parts of a file accessed by your Perl program disappearing? If so, 
>> describe the steps required to reproduce the bug and view the effects.
> 
> This program access a postgresql database, impossible for me to say 
> something, the main table has millions of records, the little tables are 
> ok.

We cannot comment unless you post an example script and/or database that 
demonstrates the bug.


>> Do you have a test suite for your Perl program?
>>
>>     https://www.perl.org/about/whitepapers/perl-testing.html
>>
>> Create a test script that elicits the bug. Then, move your Perl 
>> program and test script to another machine without RST and run the 
>> test script. That should tell you if you have an issue with your Perl 
>> program or an issue with RST.
> 
> I will take a look of perl-testing.html ; bu there, I have only my 
> laptop...

Test-driven development is a software engineering process.  You can use 
any computer.  A new Asus laptop with an NVMe drive, Debian, and Perl 
should work very well:

https://en.wikipedia.org/wiki/Test-driven_development


"Intermediate Perl" explains modules, distributions, testing, and other 
useful subjects:

https://www.oreilly.com/library/view/intermediate-perl/0596102062/


If you are serious about Perl, you will want these books:

https://www.oreilly.com/library/view/learning-perl-7th/9781491954317/

https://www.oreilly.com/library/view/perl-cookbook-2nd/0596003137/

https://www.oreilly.com/library/view/programming-perl-4th/9781449321451/


> # smartctl -t short -a /dev/nvme0n1p5

> SMART overall-health self-assessment test result: PASSED

This is the result of whatever test smartctl ran previously.


> # smartctl -t long -a /dev/nvme0n1p5

> SMART overall-health self-assessment test result: PASSED

This is the result of the smartctl 'short' test, started above.


Run 'smartctl -x /dev/nvme0n1p5' to see the result of the 'long' test.


David

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#228100

One second please, I have discovered something else : the problem is the  
same on a external HDD USB drive.

amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ ./algo-  
B1.pl
Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.
amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ ./algo-  
B1.pl
2020-01-01 - 2020-08-31
amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ ./algo-  
B1.pl
2020-01-01 - 2020-08-31
amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ ./algo-  
B1.pl
Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.
amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ ./algo-  
B1.pl
2020-01-01 - 2020-08-31
amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ ./algo-  
B1.pl
Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.
amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ ./algo-  
B1.pl
2020-01-01 - 2020-08-31
amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ ./algo-  
B1.pl
Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.
amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ ./algo-  
B1.pl
Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.
amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ ./algo-  
B1.pl
2020-01-01 - 2020-08-31
amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ ./algo-  
B1.pl
Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.

We knows that algo-B1.pl uses a PG database on the SDD, but lisblocage  
function was in the algo-B1.pl file. So I wonder if this new information  
changes all ? It seems to me. Otherwise, I will run smartctl, etc...

Thanks :)

Amer

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#228131

On 2020-10-22 03:01, A. Kapetanovic wrote:
> One second please, I have discovered something else : the problem is the 
> same on a external HDD USB drive.
> 
> amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ 
> ./algo- B1.pl
> Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.
> amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ 
> ./algo- B1.pl
> 2020-01-01 - 2020-08-31
> amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ 
> ./algo- B1.pl
> 2020-01-01 - 2020-08-31
> amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ 
> ./algo- B1.pl
> Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.
> amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ 
> ./algo- B1.pl
> 2020-01-01 - 2020-08-31
> amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ 
> ./algo- B1.pl
> Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.
> amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ 
> ./algo- B1.pl
> 2020-01-01 - 2020-08-31
> amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ 
> ./algo- B1.pl
> Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.
> amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ 
> ./algo- B1.pl
> Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.
> amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ 
> ./algo- B1.pl
> 2020-01-01 - 2020-08-31
> amel@laptopasus:/media/amel/c4e65f75-d3ed-46f3-950d-bf833b0b409c$ 
> ./algo- B1.pl
> Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.
> 
> We knows that algo-B1.pl uses a PG database on the SDD, but lisblocage 
> function was in the algo-B1.pl file. So I wonder if this new information 
> changes all ? It seems to me. Otherwise, I will run smartctl, etc...
> 
> Thanks :)
> 
> Amer


Then the problem is the Perl script and/or how the Perl script interacts 
with your database.


Who wrote algo- B1.pl?  Who designed the database?  Are they for a 
personal project, for a business, or something else?


David

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#228136

23 oct. 2020 04:27:38 David Christensen <dpchrist@holgerdanske.com>:
> Who wrote algo- B1.pl?  Who designed the database?  Are they for a personal project, for a business, or something else?

I designed all and it is for a personal business

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#228152

On 2020-10-22 21:48, A. Kapetanovic wrote:
> 23 oct. 2020 04:27:38 David Christensen <dpchrist@holgerdanske.com>:
>> Who wrote algo- B1.pl?  Who designed the database?  Are they for a personal project, for a business, or something else?
> 
> I designed all and it is for a personal business

Okay.


Do you own the four books I previously recommended?


Have you considered hiring a tutor or consultant?


On 2020-10-22 22:06, A. Kapetanovic wrote:
 >> Then the problem is the Perl script and/or how the Perl script 
interacts with your database.
 >
 > But a function vanished from my file...


Does the source code of your script change when you run the script?  If 
so, is this by design?


Please condense your script down to a short example that demonstrates 
the bug, post your code, explain what you expect the code to do, post a 
sample run, explain what happened, and explain why what happened does 
not match your expectations.


David

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#228161

David Christensen writes:
> Do you own the four books I previously recommended?

I wrote their names on a postit, for the moment. I will begin by looking on  
Test::Most

Thanks lot for these information.

> Have you considered hiring a tutor or consultant?

I want absolutely do this script myself.

> Please condense your script down to a short example that demonstrates  
> the bug, post your code, explain what you expect the code to do, post a  
> sample run, explain what happened, and explain why what happened does  
> not match your expectations.

I have found the reason of sometimes :
amel@laptopasus:~/fp/test.algoB$ ./algo-B1.pl
2020-01-01 - 2020-08-31

And sometimes :
amel@laptopasus:~/fp/test.algoB$ ./algo-B1.pl
Undefined subroutine &main::lisblocage called at ./algo-B1.pl line 161.

Is is simply the effect of the mixture of :

1. The keys of a hash given by keys() function come in different order (in  
different executions of a program).
2. I did a mistake : 'last' but should be 'next' in the loop on the keys  
above.

But the questions of the SSD is always here, I really would like a "true"  
diagnostic.

I did

smartctl -x

But the result is instantaneous :

# smartctl -x /dev/nvme0n1p5
smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-52-generic] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Number:                       SAMSUNG MZVLQ512HALU-00000
Serial Number:                      S4Y4NF0N221020
Firmware Version:                   FXV7000Q
PCI Vendor/Subsystem ID:            0x144d
IEEE OUI Identifier:                0x002538
Total NVM Capacity:                 512’110’190’592 [512 GB]
Unallocated NVM Capacity:           0
Controller ID:                      5
Number of Namespaces:               1
Namespace 1 Size/Capacity:          512’110’190’592 [512 GB]
Namespace 1 Utilization:            171’792’056’320 [171 GB]
Namespace 1 Formatted LBA Size:     512
Namespace 1 IEEE EUI-64:            002538 a201b2a36d
Local Time is:                      Sat Oct 24 18:52:07 2020 CEST
Firmware Updates (0x16):            3 Slots, no Reset required
Optional Admin Commands (0x0017):   Security Format Frmw_DL Self_Test
Optional NVM Commands (0x005f):     Comp Wr_Unc DS_Mngmt Wr_Zero  
Sav/Sel_Feat Timestmp
Maximum Data Transfer Size:         512 Pages
Warning  Comp. Temp. Threshold:     82 Celsius
Critical Comp. Temp. Threshold:     85 Celsius

Supported Power States
St Op     Max   Active     Idle   RL RT WL WT  Ent_Lat  Ex_Lat
  0 +     4.83W       -        -    0  0  0  0        0       0
  1 +     3.54W       -        -    1  1  1  1        0       0
  2 +     3.04W       -        -    2  2  2  2        0     500
  3 -   0.0500W       -        -    3  3  3  3      210    1200
  4 -   0.0050W       -        -    4  4  4  4     1000    9000

Supported LBA Sizes (NSID 0x1)
Id Fmt  Data  Metadt  Rel_Perf
  0 +     512       0         0

=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SMART/Health Information (NVMe Log 0x02)
Critical Warning:                   0x00
Temperature:                        12 Celsius
Available Spare:                    100%
Available Spare Threshold:          10%
Percentage Used:                    0%
Data Units Read:                    1’960’412 [1.00 TB]
Data Units Written:                 2’023’052 [1.03 TB]
Host Read Commands:                 16’052’101
Host Write Commands:                27’571’627
Controller Busy Time:               704
Power Cycles:                       187
Power On Hours:                     74
Unsafe Shutdowns:                   31
Media and Data Integrity Errors:    0
Error Information Log Entries:      74
Warning  Comp. Temperature Time:    0
Critical Comp. Temperature Time:    0
Temperature Sensor 1:               12 Celsius

Error Information (NVMe Log 0x01, max 64 entries)
No Errors Logged

# df
Sys. de fichiers blocs de 1K   Utilisé Disponible Uti% Monté sur
udev                 8055688         0    8055688   0% /dev
tmpfs                1619780      2032    1617748   1% /run
/dev/nvme0n1p5     224554636 108702560  104375648  52% /
tmpfs                8098884    298636    7800248   4% /dev/shm
tmpfs                   5120         4       5116   1% /run/lock
tmpfs                8098884         0    8098884   0% /sys/fs/cgroup
/dev/loop1             56704     56704          0 100% /snap/core18/1885
/dev/loop3            261760    261760          0 100%  
/snap/gnome-3-34-1804/36
/dev/loop2            166784    166784          0 100%  
/snap/gnome-3-28-1804/145
/dev/loop4            223232    223232          0 100%  
/snap/gnome-3-34-1804/60
/dev/loop0             56320     56320          0 100% /snap/core18/1880
/dev/loop5             51968     51968          0 100% /snap/snap-store/481
/dev/loop6             63616     63616          0 100% /snap/gtk-common- 
themes/1506
/dev/loop7             31744     31744          0 100% /snap/snapd/9607
/dev/loop8             44288     44288          0 100% /snap/snap-store/415
/dev/nvme0n1p1        262144     33756     228388  13% /boot/efi
/dev/loop9             31744     31744          0 100% /snap/snapd/9721
tmpfs                1619776        36    1619740   1% /run/user/1000
#

Have please someone a advice for me ?

Amer

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#228165

On 2020-10-24 09:56, A. Kapetanovic wrote:
> David Christensen writes:
>> Do you own the four books I previously recommended?
<snip>
> Have please someone a advice for me ?

Buy, read, enter all or part of the examples, and solve all or part of 
the exercises in "Learning Perl".  The more examples and exercises you 
work on, the more you will learn.


Find and join a community of Perl programmers.


david

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#228166

On 10/24/20, David Christensen <dpchrist@holgerdanske.com> wrote:
> On 2020-10-24 09:56, A. Kapetanovic wrote:
>> David Christensen writes:
>>> Do you own the four books I previously recommended?
> <snip>
>> Have please someone a advice for me ?
>
> Buy, read, enter all or part of the examples, and solve all or part of
> the exercises in "Learning Perl".  The more examples and exercises you
> work on, the more you will learn.
>
>
> Find and join a community of Perl programmers.


Researching for signs of any Perl Mongers groups near one's location
might help. What I've seen of them over a LONG period of time is that
they can be a very supportive group. That does depend on the combined
personality of each singular group, though.

https://www.pm.org/

There's also Perlweekly:

https://perlweekly.com/

A quick peek at their archives there might land a website lead that
allows for asking Perl-based questions.

For either source, Users do have to have at least tried to work
through things on their own via online tutorials and books such as
those David has suggested.

Having said that: Maybe some creative searching using the word
"beginner" and Perl lists might land something handy, too. In that
case, it's not about the "beginner" aspect. It's about finding a place
that dedicates itself to breaking things down to the absolute bottom
base step upon which ALL the rest is then built.

Cindy :)
-- 
Cindy-Sue Causey
Talking Rock, Pickens County, Georgia, USA

* runs with birdseed *

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#228137

> Then the problem is the Perl script and/or how the Perl script interacts with your database.

But a function vanished from my file...

Amer

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