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Power Failure - was Re: Can one Mount a usb Drive read-only?

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  Power Failure - was Re: Can one Mount a usb Drive read-only? Brad Rogers <brad@fineby.me.uk> - 2018-07-19 08:30 +0200
    Re: Power Failure - was Re: Can one Mount a usb Drive read-only? Kenneth Parker <sea7kenp@gmail.com> - 2018-07-19 14:00 +0200
      Re: Power Failure - was Re: Can one Mount a usb Drive read-only? Brad Rogers <brad@fineby.me.uk> - 2018-07-19 14:10 +0200
        Re: Power Failure - was Re: Can one Mount a usb Drive read-only? Kenneth Parker <sea7kenp@gmail.com> - 2018-07-19 15:20 +0200
      Re: Power Failure - was Re: Can one Mount a usb Drive read-only? deloptes <deloptes@gmail.com> - 2018-07-19 18:20 +0200
        Re: Power Failure - was Re: Can one Mount a usb Drive read-only? Brad Rogers <brad@fineby.me.uk> - 2018-07-19 18:50 +0200
          Re: Power Failure - was Re: Can one Mount a usb Drive read-only? Kenneth Parker <sea7kenp@gmail.com> - 2018-07-20 03:30 +0200
        Re: Power Failure Felix Miata <mrmazda@earthlink.net> - 2018-07-19 19:50 +0200
          Re: Power Failure deloptes <deloptes@gmail.com> - 2018-07-20 00:10 +0200
            Re: Power Failure Felix Miata <mrmazda@earthlink.net> - 2018-07-20 00:50 +0200
              Re: Power Failure Michael Stone <mstone@debian.org> - 2018-07-20 01:00 +0200

#197787 — Power Failure - was Re: Can one Mount a usb Drive read-only?

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On Wed, 18 Jul 2018 15:34:37 -0400
Cindy-Sue Causey <butterflybytes@gmail.com> wrote:

Hello Cindy-Sue,

(I've removed references, so this should no longer thread with the USB
drive thread)

>reinstall... or something.  I don't remember hardware getting fried,
>just [code]. Maybe it was even "that other" operating system or

Worst I had happen as a result of power failure was that disk the 
journal couldn't recover everything required, such that sector errors
were reported on every boot.  A reformat got around that.  Tiresome, but
not fatal.

I have had hardware get fried (a printer and an ethernet card), but that
was due to a lightning strike during a storm, not the power outages.

-- 
 Regards  _
         / )           "The blindingly obvious is
        / _)rad        never immediately apparent"
Stained glass windows keep the cold outside
Religion - Public Image Ltd

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#197792

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On Thu, Jul 19, 2018, 2:20 AM Brad Rogers <brad@fineby.me.uk> wrote:

<snip>

>
> Worst I had happen as a result of power failure was that disk the
> journal couldn't recover everything required, such that sector errors
> were reported on every boot.  A reformat got around that.  Tiresome, but
> not fatal.
>

My worst, was kind of "mild", though scary:  I had to rebuild /boot (on
ext2), because the last action was placing a copy of the Linux Kernel on
/boot.

(Scary, because it wouldn't, even *start* to Boot).

Thank Goodness, for "Live Rescue Systems"!

Kenneth Parker

>
>

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#197794

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On Thu, 19 Jul 2018 07:56:34 -0400
Kenneth Parker <sea7kenp@gmail.com> wrote:

Hello Kenneth,

>My worst, was kind of "mild", though scary:  I had to rebuild /boot (on
>ext2), because the last action was placing a copy of the Linux Kernel on
>/boot.

It was the fear of such an issue (an inability to boot) that finally
galvanised me into action and buy a UPS.

A decision that I have never regretted.

-- 
 Regards  _
         / )           "The blindingly obvious is
        / _)rad        never immediately apparent"
It's becoming an obsession
Teenage Depression - Eddie & The Hot Rods

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#197796

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On Thu, Jul 19, 2018, 8:09 AM Brad Rogers <brad@fineby.me.uk> wrote:

> On Thu, 19 Jul 2018 07:56:34 -0400
> Kenneth Parker <sea7kenp@gmail.com> wrote:
>
> Hello Kenneth,
>
> >My worst, was kind of "mild", though scary:  I had to rebuild /boot (on
> >ext2), because the last action was placing a copy of the Linux Kernel on
> >/boot.
>
> It was the fear of such an issue (an inability to boot) that finally
> galvanised me into action and buy a UPS.
>
> A decision that I have never regretted.


My /boot debacle was the trigger for my first UPS purchase.

Kenneth Parker

Kenneth Parker

>

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#197802

Kenneth Parker wrote:

> My worst, was kind of "mild", though scary:  I had to rebuild /boot (on
> ext2), because the last action was placing a copy of the Linux Kernel on
> /boot.

why not use something more decent like ext3 or ext4? we are in 2018 ;-)

regards

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#197804

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On Thu, 19 Jul 2018 18:14:19 +0200
deloptes <deloptes@gmail.com> wrote:

Hello deloptes,

>why not use something more decent like ext3 or ext4? we are in 2018 ;-)

(your smiley noted)
Ken gave no indication of time-frame, other than in the past.  Could've
been last week, could've been twenty years ago.

-- 
 Regards  _
         / )           "The blindingly obvious is
        / _)rad        never immediately apparent"
It's becoming an obsession
Teenage Depression - Eddie & The Hot Rods

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#197819

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On Thu, Jul 19, 2018 at 12:47 PM Brad Rogers <brad@fineby.me.uk> wrote:

> On Thu, 19 Jul 2018 18:14:19 +0200
> deloptes <deloptes@gmail.com> wrote:
>
> >why not use something more decent like ext3 or ext4? we are in 2018 ;-)
>
> (your smiley noted)
> Ken gave no indication of time-frame, other than in the past.  Could've
> been last week, could've been twenty years ago.
>

 Thank you, Brad.  In fact, this was back in 2006, on Ubuntu 6.06 (the
Release that was "Spammed on CD's", almost as bad as AOL used to do).  Back
then, I used ReiserFS for everything except /boot.  And I have been a
"Happy UPS User". ever since that mishap.

Kenneth Parker

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#197806 — Re: Power Failure

deloptes composed on 2018-07-19 18:14 (UTC+0200):

> why not use something more decent like ext3 or ext4? we are in 2018 ;-)

1: /boot is functionally readonly except during kernel installation and removal

2: journals consume disk space

I would be spending an enormous amount of time rescuing filesystems if not for
having UPS. I have 7 working ATM, to protect other devices in addition to PCs.
Need to replace UPS batteries commonly occurs more than once a year. Power
outages here are routine, hardly a week passes without at least one. Frequently
several occur in very short succession.
-- 
"Wisdom is supreme; therefore get wisdom. Whatever else you
get, get wisdom." Proverbs 4:7 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

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#197809 — Re: Power Failure

Felix Miata wrote:

> 1: /boot is functionally readonly except during kernel installation and
> removal
> 

not really an argument - the system did not boot for this reason

> 2: journals consume disk space

not really an argument - the system did not boot for this reason and space
in MBs is cheap nowdays

regards

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#197814 — Re: Power Failure

deloptes composed on 2018-07-20 00:00 (UTC+0200):

> Felix Miata wrote:

>> 1: /boot is functionally readonly except during kernel installation and
>> removal

> not really an argument - the system did not boot for this reason

>> 2: journals consume disk space

> not really an argument - the system did not boot for this reason and space
> in MBs is cheap nowdays

Cheap is a relative term. It's only "cheap" if it's cheap enough for a
particular context to enjoy. Even if a HD was only a dollar a TB, it wouldn't be
cheap to someone with 0 dollars.

Cheap space does not obviate the value of conservatism generally. The more space
consumed, the more space, and _time_, consumed with backup and restore
operations, even if nominal.
-- 
"Wisdom is supreme; therefore get wisdom. Whatever else you
get, get wisdom." Proverbs 4:7 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

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#197816 — Re: Power Failure

On Thu, Jul 19, 2018 at 06:45:16PM -0400, Felix Miata wrote:
>Cheap is a relative term. It's only "cheap" if it's cheap enough for a
>particular context to enjoy. Even if a HD was only a dollar a TB, it wouldn't be
>cheap to someone with 0 dollars.

Well, you can't buy any storage with zero dollars. A journal is a couple 
of megabytes, and the cost difference between, say, 64GB and 64GB-32MB 
rounds to zero.

>Cheap space does not obviate the value of conservatism generally. The more space
>consumed, the more space, and _time_, consumed with backup and restore
>operations, even if nominal.

You don't generally backup a filesystem journal, and if you're doing a 
full image copy, see above.

Conservatism, in this case, is not doing something weird with /boot.

Mike Stone

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