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 ?
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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