Re: RAID5 on athlon64 machines

2006-02-12 Thread Bakul Shah
> > You compute max data rates by considering the most optimistic > > scenario, which is large sequetial writes. For *this* > > situation write rate will be higher than a single disk's. > > How can the RAID5 write rate be higher for the whole array if not > only it needs to write the data to all

Re: RAID5 on athlon64 machines

2006-02-12 Thread soralx
> On Sun, 12 Feb 2006, [EMAIL PROTECTED] wrote: > [missing attribution] > > > > You compute max data rates by considering the most optimistic > > > scenario, which is large sequetial writes. For *this* > > > situation write rate will be higher than a single disk's. > > > > How can the RAID5 write

Re: RAID5 on athlon64 machines

2006-02-12 Thread David Taylor
On Sun, 12 Feb 2006, [EMAIL PROTECTED] wrote: [missing attribution] > > > > You compute max data rates by considering the most optimistic > > scenario, which is large sequetial writes. For *this* > > situation write rate will be higher than a single disk's. > > How can the RAID5 write rate be hig

Re: RAID5 on athlon64 machines

2006-02-12 Thread soralx
> > > Theoretically the sequential write rate should be same or > > > higher than the sequential read rate. Given an N+1 disk > > > > Seq write rate for the whole RAID5 array will always be lower > > than the write rate for it's single disk. > > You compute max data rates by considering the most

Re: RAID5 on athlon64 machines

2006-02-11 Thread Bakul Shah
> > > Theoretically the sequential write rate should be same or > > higher than the sequential read rate. Given an N+1 disk > > Seq write rate for the whole RAID5 array will always be lower > than the write rate for it's single disk. You compute max data rates by considering the most optimistic

Re: RAID5 on athlon64 machines

2006-02-11 Thread soralx
> Theoretically the sequential write rate should be same or > higher than the sequential read rate. Given an N+1 disk Seq write rate for the whole RAID5 array will always be lower than the write rate for it's single disk. See 'http://en.wikipedia.org/wiki/RAID#RAID_5' " Traditional RAID5 A1

RAID5 on athlon64 machines

2006-02-11 Thread Bakul Shah
I built an Asus A8N SLI Deluxe based system and installed FreeBSD-6.1-BETA1 on it. This works well enough. Now I am looking for a decent RAID5 solution. This motherboard has two SATA RAID controllers. But one does only RAID1. The other supports RAID5 but seems to require s/w assistance from wi