Sorry, but what exactly were you thinking of when putting 40+ drives in a 
single RAIDz1 VDEV? 

roy 

----- Original Message -----





Hi, 


I have a SunFire X4540 with 19TB in a RAID-Z configuration; here's my zpool 
status: 



pool: raid 
state: UNAVAIL 
status: One or more devices are faulted in response to IO failures. 
action: Make sure the affected devices are connected, then run 'zpool clear'. 
see: http://www.sun.com/msg/ZFS-8000-HC 
scrub: resilver in progress for 84h11m, 99.47% done, 0h27m to go 
config: 


NAME STATE READ WRITE CKSUM 
raid UNAVAIL 0 0 451 insufficient replicas 
raidz1 UNAVAIL 0 0 902 insufficient replicas 
c0t3d0 ONLINE 0 0 0 
c1t3d0 ONLINE 0 0 0 
c2t3d0 ONLINE 0 0 0 
c3t3d0 ONLINE 0 0 0 
c4t3d0 UNAVAIL 472 94 0 cannot open 
c5t3d0 ONLINE 0 0 0 
c0t7d0 ONLINE 0 0 0 
c1t7d0 ONLINE 0 0 0 
c2t7d0 ONLINE 0 0 0 
c3t7d0 ONLINE 0 0 0 
c0t2d0 ONLINE 0 0 0 
c1t2d0 ONLINE 0 0 0 
c2t2d0 ONLINE 0 0 0 
c3t2d0 ONLINE 0 0 0 
c4t2d0 ONLINE 0 0 0 
c4t6d0 ONLINE 0 0 0 
spare DEGRADED 7 0 66.8M 
c5t2d0 FAULTED 11 2 0 too many errors 
replacing DEGRADED 0 0 0 
c5t7d0 FAULTED 13 0 0 too many errors 
c5t6d0 ONLINE 0 0 0 202G resilvered 
c0t6d0 ONLINE 0 0 0 
c1t6d0 ONLINE 0 0 0 
c2t6d0 ONLINE 0 0 0 
c3t6d0 ONLINE 0 0 0 
spare DEGRADED 0 0 0 
c0t1d0 FAULTED 0 0 0 too many errors 
c4t7d0 ONLINE 0 0 0 
c1t1d0 ONLINE 0 0 0 
c2t1d0 ONLINE 0 0 0 
c3t1d0 ONLINE 0 0 0 
c4t1d0 ONLINE 0 0 0 
c4t5d0 ONLINE 0 0 0 
c0t5d0 ONLINE 0 0 0 
c1t5d0 ONLINE 0 0 0 
c2t5d0 ONLINE 0 0 0 
c3t5d0 ONLINE 0 0 0 
c5t1d0 ONLINE 0 0 0 
c5t5d0 ONLINE 0 0 0 
c0t4d0 ONLINE 0 0 0 
c2t0d0 ONLINE 0 0 0 
c3t0d0 ONLINE 0 0 0 
c4t0d0 ONLINE 0 0 0 
c5t0d0 ONLINE 0 0 0 
c1t4d0 ONLINE 0 0 0 
c2t4d0 ONLINE 0 0 0 
c3t4d0 ONLINE 0 0 0 
c4t4d0 ONLINE 0 0 0 
spares 
c4t7d0 INUSE currently in use 
c5t7d0 INUSE currently in use 
c5t6d0 INUSE currently in use 
c5t4d0 AVAIL 


errors: 911 data errors, use '-v' for a list 


It looks like the resilver has got stuck; Oracle have sent out a replacement 
disk today and are asking me to replace c5t7d0. 



If I am understanding the documentation correctly, I believe I need to do the 
following: 


zpool offline raid c5t7d0 
cfgadm -c unconfigure c5::dsk/c5t7d0 


....before physically replacing the disk. However, I get the following messages 
when trying to do this: 


# zpool offline raid c5t7d0 
cannot offline c5t7d0: device is reserved as a hot spare 
# cfgadm -c unconfigure c5::dsk/c5t7d0 
cfgadm: Hardware specific failure: failed to unconfigure SCSI device: Device 
busy 


I also tried a detach: 


# zpool detach raid c5t7d0 
cannot detach c5t7d0: pool I/O is currently suspended 


And I also tried using the last available spare to try and free up the disk I 
need to replace: 


# zpool replace raid c5t2d0 c5t4d0 
Cannot replace c5t2d0 with c5t4d0: device has already been replaced with a 
spare 



I am new to ZFS, how would I go about safely removing the affected drive in the 
software, before physically replacing it? 


I'm also not sure at exactly which juncture to do a 'zpool clear' and 'zpool 
scrub'? 


I'd appreciate any guidance - thanks in advance, 


Mark 








---- 
Mark Mahabir 
Systems Manager, X-Ray and Observational Astronomy 


Dept. of Physics & Astronomy, University of Leicester, LE1 7RH 
Tel: +44(0)116 252 5652 
email: mark.maha...@leicester.ac.uk 


Elite Without Being Elitist 
Times Higher Awards Winner 2007, 2008, 2009, 2010 
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-- 
Vennlige hilsener / Best regards 

roy 
-- 
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