On 31 August 2007, Feizhou <feizhou at graffiti.net> wrote: > Message: 77 <snip> > Whoa there! > > Hardware raid + battery backed up memory cache in raid 1,10 mode is > hard to beat with software raid and hardware raid offers data > integrity guarantee beyond software raid. > > If you were planning a huge array especially a raid5 array, then > software raid may be better. Hardware RAID cards all come with memory > caches now so their throughput is no longer limited. > > Another route you can go is getting a PCI/PCIe/PCI-X BBU RAM/NVRAM > card to put an external journal on to speed up fsync performance for > filesystems like ext3 over software raid since these cards can go > beyond 1GB of memory unlike hardware raid cards that usually max out > at 256MB. > > Software RAID is also good if you need to be able to transfer the > disks to another box that does not have a hardware raid controller or > the same controller. > Feizhou: THANK YOU! What you wrote is *extremely* helpful (and educational) for me! MUCH appreciated! Lanny