Sorry. This statement is incorrect. If you aren't using ZFS, or even a GEOM volume with mirror/RAID5/softup/etc, you cannot make the statement that hardware RAID is faster. I learned that 3 years ago.
It takes about 30 minutes to mirror 1.5TB on ZFS. Try that on hardware RAID. I did the same with 80 GB SATA drives a couple of years ago. Gmirror killed hardware mirror by 50% When your processor on your hardware RAID card is junk and you have a kickass processor and good chunk of memory on your main system and decent controller that isn't getting maxed, the "hardware RAID is always faster" paradigm walked out the door a few years ago. This does not go for EMC, IBM, Hitachi high-end storage arrays where you write to TBs of RAM Cache. P. ________________________________ From: Wojciech Puchar <woj...@wojtek.tensor.gdynia.pl> To: Gary Gatten <ggat...@waddell.com> Cc: freebsd-questions@freebsd.org; Benjamin Krueger <benja...@seattlefenix.net>; Olivier Mueller <om-lists-...@omx.ch>; freebsd-performa...@freebsd.org; Bill Moran <wmo...@potentialtech.com> Sent: Wednesday, May 6, 2009 2:31:16 PM Subject: RE: filesystem: 12h to delete 32GB of data > It could just be me, but I swear Hardware RAID has been faster for many > many years, especially with RAID5 arrays - or anything that requires maybe with RAID5, but using RAID5 today (huge disk sizes, little sense to save on disk space) instead of RAID1/10 doesn't make much sense, as RAID5 is slow on writes by design _______________________________________________ freebsd-performa...@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "freebsd-performance-unsubscr...@freebsd.org" _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
