I'm running a newly setup FreeBSD 9.0-CURRENT/amd64 SMP box. The former
OS was FreeBSD 8.1-PRE/amd64. Attached to the system are three WD
harddrives with ZFS as filesystem on GPT partitioning scheme. Two 1TB
HDD are spanning a volume with 2 TB capacity which is quite fast due to
parallel access through ZFS. The underlying layout is, as mentioned,
GPT, bot devices are named /dev/ada1p1 and /dev/ada2p1. The thir drive
is a WD Caviar Green 2TB HDD acting as a compressed ZFS backup media,
also based on a GPT partitioning scheme and known as device /dev/ada3p1.
In FreeBSD 8.2-PRE/amd64 I can use the JBOD volume resembled from two
1TB HDD without problems, mounting is all right, dismounting, also with
the 2TB HDD, labeld as BACKUP00 volume in ZFS. Doing a "zpool export" on
both ZFS volumes works fine in FBSD 8, importing is also no problem. The
system's log does not show any kind of irregularities, errors or
something else indicating soemthing weird with one of the three devices.
Exporting both volumes in FreeBSD 8 works. But importing them in FreeBSD
9.0-CURRENT/amd64 as with the most recent make world of today fails on
the 2TB HDD (ZFS pool/volume BACKUP00). Issuing "zpool import BACKUP00"
results in
cannot import 'BACKUP': no such pool available
and on console I receive message
ZFS WARNING: Unable to attach to ada1
But the drive is and was ada3!
Looking with zpool status, I get the follwoing picture:
pool: BACKUP00
state: FAULTED
status: One or more devices could not be used because the label is missing
or invalid. There are insufficient replicas for the pool to
continue
functioning.
action: Destroy and re-create the pool from a backup source.
see: http://www.sun.com/msg/ZFS-8000-5E
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
BACKUP00 FAULTED 0 0 0 corrupted data
ada3 UNAVAIL 0 0 0 corrupted data
pool: THOR00
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
THOR00 ONLINE 0 0 0
ada1p1 ONLINE 0 0 0
ada2p1 ONLINE 0 0 0
errors: No known data errors
This picture differs from what I see i FreeBSD 8.2-PRE/amd issuing the
same command!
I did a full "zpool scrub" on both pools - no effect.
Surprisingly, the GPT partition of the pool BACKUP00 isn't shown in
FreeBSD 9, while I see ada3p1 in FreeBSD 8.2.
gpart show ada3 lists this:
=> 34 3907029101 ada3 GPT (1.8T)
34 4062 - free - (2.0M)
4096 3907025039 1 freebsd-zfs (1.8T)
The drive in question is a WesternDigital Caviar Green WD (<WDC
WD20EURS-63Z9B1 80.00A80> at scbus7 target 0 lun 0 (pass3,ada3)).
Can someone explain what#s going on? The drive in question is one of the
new 4k sized physical block devices. Why is FreeBSD 8 dealing with the
HDD, FreeBSD 9 not? Any help at this point? Hope the volume is not lost.
Thanks in advance,
Oliver
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