Roshan,
Could you provide more detail please. The host and zfs should be
unaware of any EMC array side replication so this sounds more like an
EMC misconfiguration than a ZFS problem. Did you look in the messages
file to see if anything happened to the devices that were in your
zpools? If so then that wouldn't be a zfs error. If your EMC devices
fall offline because of something happening on the array or fabric
then zfs is not to blame. The same thing would have happened with any
other filesystem built on those devices.
What kind of pools were in use, raidz, mirror or simple stripe?
Regards,
Vic
On 6/19/07, Roshan Perera [EMAIL PROTECTED] wrote:
Hi All,
We have come across a problem at a client where ZFS brought the system down
with a write error on a EMC device due to mirroring done at the EMC level and
not ZFS, Client is total EMC committed and not too happy to use the ZFS for
oring/RAID-Z. I have seen the notes below about the ZFS and SAN attached
devices and understand the ZFS behaviour.
Can someone help me with the following Questions:
Is this the way ZFS will work in the future ?
is there going to be any compromise to allow SAN Raid and ZFS to do the rest.
If so when and if possible details of it ?
Many Thanks
Rgds
Roshan
ZFS work with SAN-attached devices?
Yes, ZFS works with either direct-attached devices or SAN-attached
devices. However, if your storage pool contains no mirror or RAID-Z
top-level devices, ZFS can only report checksum errors but cannot
correct them. If your storage pool consists of mirror or RAID-Z
devices built using storage from SAN-attached devices, ZFS can report
and correct checksum errors.
This says that if we are not using ZFS raid or mirror then the
expected event would be for ZFS to report but not fix the error. In
our case the system kernel panicked, which is something different. Is
the FAQ wrong or is there a bug in ZFS?
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