Date: Tue, 08 Apr 2014 20:04:44 +0100 From: Frank Leonhardt <freebsd-doc@fjl.co.uk> To: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Adding second drive to ZFS mirror - FreeBSD, atacontrol, gptid and documentation Message-ID: <5344484C.9000504@fjl.co.uk>
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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!
Thanks, Frank.
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