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Groups > comp.sys.mac.hardware.storage > #1095

Re: Can't see the partitions on my external SATA HDD when using different adapter/controllers (Vantec vs. no brand name)?

Cross-posted to 3 groups.

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Ant wrote:
> I decided to do more experiments for curiousity and fun. I decided to
> use one of the non-Vantec brands and redo the 3 partitions (2 Mac OS
> Extended FS + 1 FAT) on the drive. I didn't put any data on it yet. I
> disconnected and connected with the Vantec brand, and it couldn't see
> them! I put in the OTHER non-Vantec brand, and it saw them! So both
> non-Vantec brands could see it, but not Vantec. I reconnected them to
> the 64-bit W7 EE SP1 laptop/notebook. Similiar results even though it
> told me that FAT partition (E:) was unreadable and asked me to format it
> or not. Oy!! FYI from Mac OS X v10.10.5 (Yosemite):
>
> $ diskutil info disk2
>     Device Identifier:        disk2
>     Device Node:              /dev/disk2
>     Part of Whole:            disk2
>     Device / Media Name:      WDC WD20 EZRX-00D8PB0 Media
>     Volume Name:              Not applicable (no file system)
>     Mounted:                  Not applicable (no file system)
>     File System:              None
>
>     Content (IOContent):      GUID_partition_scheme
>     OS Can Be Installed:      No
>     Media Type:               Generic
>     Protocol:                 USB
>     SMART Status:             Not Supported
>
>     Total Size:               2.0 TB (2000398934016 Bytes) (exactly 3907029168 512-Byte-Units)
>     Volume Free Space:        Not applicable (no file system)
>     Device Block Size:        512 Bytes
>
>     Read-Only Media:          No
>     Read-Only Volume:         Not applicable (no file system)
>     Ejectable:                Yes
>
>     Whole:                    Yes
>     Internal:                 No
>     OS 9 Drivers:             No
>     Low Level Format:         Not supported
>
>
> Is there even a way to make all three and others, that I don't have,
> work? Maybe I need a different brand? I might as well get this issue
> resolved to avoid later. Darn electronics like computers. :(

You have partitioned the disk(s) on a Mac. This means the GUID is used 
as standard file system. If a Windows computer should be able to see and 
use the disk(s), you must use the MBR (Master Boot record) when you 
partition the disk(s).

In DiskUtility select 'Partition', choose the number of partitions, 
select 'Preferences' and choose 'Master Boot Record', click OK, select 
'HFS+ (Journalized', click 'Apply'.

Now the disk will be with three HFS+ partitions. Go to the sidebar and 
mark the one you need for FAT32 and then select 'Erase' in the upper 
tabs. select 'FAT32' in the popup menu, click 'Erase'. The selected 
FAT32 partition will now be fully win compatible.

BUT - the two HFS+ partitions may not be visible in Win7. If I recall 
right it isn't all the Win7 versions that are able to see and read/write 
to/from HFS+ partitions.

If you want the disk(s) to be fully usable on both Mac OS X machines and 
a Win7 laptop, I'll recommend to partition the disk(s) with MBR file 
system and then select NTFS for all partitions. OS X can both read/write 
to/from NTFS just as Win7 will.

The only thing to note here is that you won't be able to use a MBR 
partitioned disk as a bootdisk on a Mac. Here the file system must be GUID.

HTH, Cheers, Erik Richard

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Erik Richard Sørensen <mac-daneRE@MOVEstofanet.dk>
NisusWriter - The Future In Multilingual Text Processing - www.nisus.com
Openoffice.org - The Modern Productivity Solution - www.openoffice.org
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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Mac OS X doesn't see the encrypted partitions on my external SATA HDD when using different adapter/controllers? ANTant@zimage.com (Ant) - 2015-11-16 20:44 -0600
  Re: Mac OS X doesn't see the encrypted partitions on my external SATA HDD when using different adapter/controllers? Jolly Roger <jollyroger@pobox.com> - 2015-11-17 02:56 +0000
    Re: Mac OS X doesn't see the encrypted partitions on my external SATA HDD when using different adapter/controllers? ANTant@zimage.com (Ant) - 2015-11-17 01:09 -0600
      Re: Mac OS X doesn't see the encrypted partitions on my external SATA HDD when using different adapter/controllers? dempson@actrix.gen.nz (David Empson) - 2015-11-17 20:28 +1300
        Re: Mac OS X doesn't see the encrypted partitions on my external SATA HDD when using different adapter/controllers? ANTant@zimage.com (Ant) - 2015-11-17 02:30 -0600
        Re: Mac OS X doesn't see the encrypted partitions on my external SATA HDD when using different adapter/controllers? ANTant@zimage.com (Ant) - 2015-11-17 11:59 -0600
          Re: Mac OS X doesn't see the encrypted partitions on my external SATA HDD when using different adapter/controllers? ANTant@zimage.com (Ant) - 2015-11-17 16:07 -0600
          Re: Mac OS X doesn't see the encrypted partitions on my external SATA HDD when using different adapter/controllers? dempson@actrix.gen.nz (David Empson) - 2015-11-18 13:59 +1300
            Re: Mac OS X doesn't see the encrypted partitions on my external SATA HDD when using different adapter/controllers? ANTant@zimage.com (Ant) - 2015-11-17 20:54 -0600
              Re: Mac OS X doesn't see the encrypted partitions on my external SATA HDD when using different adapter/controllers? dempson@actrix.gen.nz (David Empson) - 2015-11-18 18:01 +1300
                Re: Mac OS X doesn't see the encrypted partitions on my external SATA HDD when using different adapter/controllers? ANTant@zimage.com (Ant) - 2015-11-18 12:01 -0600
                Can't see the partitions on my external SATA HDD when using different adapter/controllers (Vantec vs. no brand name)? ANTant@zimage.com (Ant) - 2015-11-20 19:59 -0600
                Re: Can't see the partitions on my external SATA HDD when using different adapter/controllers (Vantec vs. no brand name)? ErikRS <mac-dane@is.invalid> - 2015-11-21 04:23 +0100
                Re: Can't see the partitions on my external SATA HDD when using different adapter/controllers (Vantec vs. no brand name)? ANTant@zimage.com (Ant) - 2015-11-21 00:14 -0600
                Re: Can't see the partitions on my external SATA HDD when using different adapter/controllers (Vantec vs. no brand name)? dempson@actrix.gen.nz (David Empson) - 2015-11-22 01:11 +1300
                Re: Can't see the partitions on my external SATA HDD when using different adapter/controllers (Vantec vs. no brand name)? ANTant@zimage.com (Ant) - 2015-11-21 11:23 -0600
                Re: Can't see the partitions on my external SATA HDD when using different adapter/controllers (Vantec vs. no brand name)? dempson@actrix.gen.nz (David Empson) - 2015-11-22 10:04 +1300
                Re: Can't see the partitions on my external SATA HDD when using different adapter/controllers (Vantec vs. no brand name)? ANTant@zimage.com (Ant) - 2015-11-21 16:51 -0600
                Re: Can't see the partitions on my external SATA HDD when using different adapter/controllers (Vantec vs. no brand name)? Lewis <g.kreme@gmail.com.dontsendmecopies> - 2015-11-22 05:05 +0000
                Re: Can't see the partitions on my external SATA HDD when using different adapter/controllers (Vantec vs. no brand name)? ANTant@zimage.com (Ant) - 2015-11-22 00:19 -0600
                Re: Can't see the partitions on my external SATA HDD when using different adapter/controllers (Vantec vs. no brand name)? Robert Nichols <SEE_SIGNATURE@localhost.localdomain.invalid> - 2015-11-22 09:51 -0600

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