Hi Ahmed, Ahmed Kamal wrote:
There's some long discussion at zfs-discuss, about zfs problems with hardware that lies about disk write ordering and disk flushing. Can anyone confirm if Sun's new 7110 box hardware is "known" to be immune to such ill effects ? Did Sun specifically test against this On another note, is the 7110 limited to the internal disks .. can it be expanded with external disk shelves in a supported configuration ? 1TB in a mirrored configuration is a little tight for me
I think the question you're asking is about smart arrays that have battery backed caches. For the 7110 it is all internal disks. In this situation ZFS knows about them, they respect the write cache flush commands that ZFS will send when they write a transaction group.
For the 7000 series in general you can only attach qualified arrays (for the 7410 specifically). In this case ZFS sees them as individual disks and knows how to flush the cache appropriately. There is no 'lying' that goes on here.
Does that answer your question? peter _______________________________________________ storage-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/storage-discuss
