On Thu, 2009-07-16 at 12:26 -0500, Linda kateley wrote: > One of the best parts of zfs is it's ability to check the datablock > checksums on read to verify data. If the checksum is bad/error zfs will > look for a good copy of the data. If you use hardware raid, zfs will not > be aware of the redundent copy. This makes bypassing the hardware raid > appealing.
That's what I figured. The machine that has volunteered to have OpenSolaris on it is an HP Proliant DL380. There is a BIOS setting to boot from the standard IDE controller or either the RAID controller. > Also, i just got done with a benchmark for a large customer and the > raidz performance numbers were very good. better than mirror. raidz2 > also better than striped mirrors. The typical reason for hardware raid > is to have raid calculations offloaded, but todays processors have so > much power, that the raid calculations barely are visable. We're anxious to spend some time with this, but have to finish another project first to free up the machine in question. -- "...and all watched over by machines of loving grace." Glenn Holmer http://www.lyonlabs.org
