-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > They are all different questions: > > * Hardware RAID vs Software RAID > Hardware RAID offers more performance and often more sophisticated RAID > features. > Basically you're offloading the work for the RAID setup to an external > piece of hardware (the controller) instead of your own server. > Depending on how much performance you need it's well worth the money. > Another advantage is that Hardware RAID controllers often offer you the > opportunity to extend your RAID array beyond the usual 4 SATA > interfaces. Depends on the card though.
This is not necessarily the case, typically if you are CPU bound then the above statement is true. If you are IO bound, then software raid offers, overall, better throughput to the disk and allows for more flexibility. Back in the day... we were running the LSI MegaRAID controllers with RAID 1 on 9gig SCSI disks, we were choking our application (mysql/mod_perl) we took the MegaRAID controller out and performance increased by about 25%. (note: this is a real world situation) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (MingW32) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFD4K+ay9wPyZpnL2URAk+XAJ9lq7ufocDoN4uOETYFCRbSF1CDQQCfZ+Vm ZxGtUYNsEZyLuBa7/lHTN/A= =GfNR -----END PGP SIGNATURE----- -- [email protected] mailing list
