Adding second drive to ZFS mirror - FreeBSD, atacontrol, gptid and documentation
Frank Leonhardt
frank2 at fjl.co.uk
Tue Apr 22 22:30:21 UTC 2014
On 08/04/2014 20:04, Frank Leonhardt wrote:
> Background: I ordered two identical drives with a view to installing
> FreeBSD 10 on a ZFS mirror. One drive was DOA so I sent it back and
> pressed on. It was replaced with an identical drive. Now I come to
> creating a mirrored ZFS root post-install.
>
> The new drive is there and appears in the gptid directory (I think). I
> have:
>
> # ls -l /dev/gptid
> crw-r----- 1 root operator 0x5d Mar 20 11:24
> b20a8b87-9419-11e3-9063-001fc6b111fc
> crw-r----- 1 root operator 0x61 Mar 18 16:50
> b251371d-9419-11e3-9063-001fc6b111fc
>
> I'm a little hazy about how I tie this up. I definitely have
> /dev/ad4p? and /dev/ad6 when I look.
>
> But this get's weird. atacontrol is missing - we're supposed to use
> camcontrol now, right? Okay, it's implied as being there in the
> release notes, but there's no man page for it and camcontrol produces:
>
> # camcontrol devlist
> <WDC WD10EFRX-68JCSN0 01.01A01> at scbus0 target 0 lun 0 (ada0,pass0)
> <WDC WD10EFRX-68PJCN0 01.01A01> at scbus1 target 0 lun 0 (ada1,pass1)
> <Generic 2.0 Reader -0 1.00> at scbus5 target 0 lun 0 (da0,pass2)
> <Generic 2.0 Reader -1 1.00> at scbus5 target 0 lun 1 (da1,pass3)
> <Generic 2.0 Reader -2 1.00> at scbus5 target 0 lun 2 (da2,pass4)
>
> The top two are my babies, and they appear in /dev too. (I am certain
> there are NO SCSI or USB drives on this box):
>
> crw-r----- 1 root operator 0x51 Mar 18 16:50 /dev/ada0
> crw-r----- 1 root operator 0x53 Mar 20 11:24 /dev/ada0p1
> crw-r----- 1 root operator 0x55 Mar 18 16:50 /dev/ada0p2
> crw-r----- 1 root operator 0x57 Mar 18 16:50 /dev/ada0p3
> crw-r----- 1 root operator 0x5a Mar 18 16:50 /dev/ada1
>
> What's going on? I just ran with it and tried to add the second drive
> as a mirror using the instructions for Solaris published by Oracle:
>
> # zpool attach zroot gptid/b251371d-9419-11e3-9063-001fc6b111fc
> gptid/b20a8b87-9419-11e3-9063-001fc6b111fc
>
> And for my trouble I got:
>
> cannot attach gptid/b20a8b87-9419-11e3-9063-001fc6b111fc to
> gptid/b251371d-9419-11e3-9063-001fc6b111fc: device is too small
>
> For completeness:
>
> # zpool status
>
> pool: zroot
> state: ONLINE
> scan: none requested
> config:
>
> NAME STATE READ WRITE
> CKSUM
> zroot ONLINE 0 0 0
> gptid/b251371d-9419-11e3-9063-001fc6b111fc ONLINE 0 0 0
>
>
> Does anyone understand this? Am I doing something wrong? The FreeBSD
> installer slices up the drive whereas Solaris doesn't (AFAIK) and this
> may relevant. In case the new drive, although theoretically identical,
> was actually "too small" as per the error message I checked:
>
> Old Drive:
>
> Model Family: Western Digital Red (AF)
> Device Model: WDC WD10EFRX-68JCSN0
> Serial Number: WD-WCC1U4956043
> LU WWN Device Id: 5 0014ee 2b3cb08f1
> Firmware Version: 01.01A01
> User Capacity: 1,000,204,886,016 bytes [1.00 TB]
> Sector Sizes: 512 bytes logical, 4096 bytes physical
> Device is: In smartctl database [for details use: -P show]
> ATA Version is: ATA8-ACS (minor revision not indicated)
> SATA Version is: SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
>
> New Drive:
>
> Model Family: Western Digital Red (AF)
> Device Model: WDC WD10EFRX-68PJCN0
> Serial Number: WD-WCC4J1746659
> LU WWN Device Id: 5 0014ee 25ef68b37
> Firmware Version: 01.01A01
> User Capacity: 1,000,204,886,016 bytes [1.00 TB]
> Sector Sizes: 512 bytes logical, 4096 bytes physical
> Rotation Rate: 5400 rpm
> Device is: In smartctl database [for details use: -P show]
> ATA Version is: ACS-2 (minor revision not indicated)
> SATA Version is: SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
>
> As I said, identical. I've obviously guessed the runes incorrectly. Help!
>
Well, so much for ZFS. After a couple more weeks trying, and no one
hereabouts having any clue, I gave up and reinstalled FreeBSD 10, wiping
out the first drive in the process. It was a PITA to have to do it, but
it worked just fine (no messages about the drives being the wrong size
or anything else like that).
Adding a mirror drive to a zroot initially created by the FreeBSD 10
installer remains unanswered question.
Regards, Frank.
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