Having casually used IRIX in the past and used BeOS, Windows, and MacOS as
primary OSes, last week I set up a RAIDZ NAS with four Western Digital 1.5TB
drives and copied over data from my WinXP box. All of the hardware is fresh
out of the box so I did not expect any hardware problems, but when I ran zpool
after a few days of uptime and copying 2.4TB of data to the system I received
the following:
da...@opensolarisnas:~$ zpool status mediapool
pool: mediapool
state: DEGRADED
status: One or more devices are faulted in response to persistent errors.
Sufficient replicas exist for the pool to continue functioning in a
degraded state.
action: Replace the faulted device, or use 'zpool clear' to mark the device
repaired.
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
mediapool DEGRADED 0 0 0
raidz1 DEGRADED 0 0 0
c8t0d0 ONLINE 0 0 0
c8t1d0 ONLINE 0 0 0
c8t2d0 ONLINE 0 0 0
c8t3d0 FAULTED 0 0 0 too many errors
errors: No known data errors
da...@opensolarisnas:~$
I read the Solaris documentation and it seemed to indicate that I needed to run
zpool clear.
da...@opensolarisnas:~$ zpool clear mediapool
And then the fun began. The system froze and rebooted and I was stuck in a
constant reboot cycle that would get to grub and selecting “opensolaris-2” and
boot process and crash. Removing the SATA card that the RAIDZ disks were
attached to would result in a successful boot. I reinserted the card, went
through a few unsuccessful reboots, and magically it booted all the way for me
to log in. I then received the following:
me...@opensolarisnas:~$ zpool status -v mediapool
pool: mediapool
state: DEGRADED
status: One or more devices could not be used because the label is missing or
invalid. Sufficient replicas exist for the pool to continue
functioning in a degraded state.
action: Replace the device using 'zpool replace'.
see: http://www.sun.com/msg/ZFS-8000-4J
scrub: scrub in progress for 0h2m, 0.29% done, 16h12m to go
config:
NAME STATE READ WRITE CKSUM
mediapool DEGRADED 0 0 0
raidz1 DEGRADED 0 0 0
c8t0d0 ONLINE 0 0 0
c8t1d0 ONLINE 0 0 0
c8t2d0 ONLINE 0 0 0
c8t3d0 UNAVAIL 7 0 0 experienced I/O failures
errors: No known data errors
me...@opensolarisnas:~$
I shut the machine down and unplugged the power supply and removed the SATA
card and reinserted it, removed each of the SATA cables individually and
reinserted them, removed each of the SATA power cables and reinserted them.
Rebooted:
da...@opensolarisnas:~# zpool status -x mediapool
pool: mediapool
state: DEGRADED
status: One or more devices is currently being resilvered. The pool will
continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
scrub: resilver in progress for 0h20m, 2.68% done, 12h29m to go
config:
NAME STATE READ WRITE CKSUM
mediapool DEGRADED 0 0 0
raidz1 DEGRADED 0 0 0
c8t0d0 ONLINE 0 0 0
c8t1d0 ONLINE 0 0 0
c8t2d0 ONLINE 0 0 0
c8t3d0 REMOVED 0 0 0
errors: No known data errors
da...@opensolarisnas:~#
The resilvering completed everything seemed fine and I shut the machine down
and rebooted later and went through the same boot & crash cycle that never got
me to the login screen until it finally did get me to that screen for unknown
reasons. The machine is resilvering currently with the zpool status the same
as above. What happened, why did it happen, and how can I stop it from
happening again? Does OpenSolaris believe that c8t3d0 is not connected to the
SATA card? The SATA card BIOS sees all four drives. What is the best way for
me to figure out which drive is c8t3d0? Some operating systems will tell you
which drive is which by telling you the serial number of the drive. Does
OpenSolaris do this? If so, how? I looked through all of the
Solaris/OpenSolaris documentation re: ZFS and RAIDZ for a mention of a
“removed” status for a drive in RAIDZ configuration, but could not find mention
outside of mirrors having this error. Page 231 of the OS Bible mentions
reattaching a drive in the “removed” status from a mirror. Does this mean
physically reattaching the drive (unplugging it and replugging it in) or does
it mean somehow software reattaching it? If I run “zpool offline –t c8t3d0”
and reboot and then “zpool replace mediapool c8t3d0 “, then “zpool online
mediapool c8t3d0 “ will this solve all my issues?
There is another issue and I don’t if it is related or not. If it isn’t
related, I will start another thread. The size of the RAIDZ1 available space
before I put anything on it was 4TB. I put ~=2.4TB of data on it. This is the
size of the data on the WinXP NTFS box, what Nautilus reports and what Disk
Usage Analyzer reports. And yet “zfs list” reports I only have 432GB free.
The Disk Usage Analyzer reports that the filesystem capacity of mediapool is
2905.9GB. The 2905GB would add correctly with 2.4TB + 432GB, but where did
1.1TB go? Is this from c8t3d0 being missing? I did move ~=2TB of data to
mediapool and use Nautilus to delete it. I saw nothing in the Trash can, so I
am assuming that it has been deleted. Is this a correct assumption?
BTW, all of the data is in it’s original state on the WinXP boxes, so
if need be, I can start all over from scratch with the OpenSolaris installation
and RAIDZ1 filesystem. I am not keen on this as the 2.4TB of data is spread
around and it takes forever to copy 2.4TB of data.
Thanks in advance,
David
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