Hello Anton, Thursday, January 4, 2007, 3:46:48 AM, you wrote:
>> Is there some reason why a small read on a raidz2 is not statistically very >> likely to require I/O on only one device? Assuming a non-degraded pool of >> course. ABR> ZFS stores its checksums for RAIDZ/RAIDZ2 in such a way that all ABR> disks must be read to compute and verify the checksum. It's not about the checksum but about how a fs block is stored in raid-z[12] case - it's spread out to all non-parity disks so in order to read one fs block you have to read fromm all disks except parity disks. -- Best regards, Robert mailto:[EMAIL PROTECTED] http://milek.blogspot.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
