Two disks RAID 0 performance lower than of a single disk?

2001-02-25 Thread Joao Cardoso
Hi, I have setup a raid0 on two u2w SCSI disks, but the performance, as reported by tiobench and bonnie++, is inferior of a single (the faster) disk; can this be because the two disks are different or the filesystem is reiserfs? I run the tests in multiuser, without user activity, but under X

Re: partitions for RAID volumes?

2001-02-25 Thread Neil Brown
On Thursday February 22, [EMAIL PROTECTED] wrote: [Sorry about the delay in replying, but as this mail was not addressed to me ("neilb" did not appear in headers) it didn't get a very high priority in my mail reading. Please, when sending email to me, address it to me so my filtering can work

Re: Urgent Problem: moving a raid

2001-02-25 Thread Eyal Lebedinsky
Neil Brown wrote: > > On Sunday February 25, [EMAIL PROTECTED] wrote: > > Neil Brown wrote: > > > > OK, this time I really want to know how this should be handled. > > > > > > Well. it "should" be handled by re-writing various bits of raid code > > > to make it all work more easily, but without d

Re: MD reverting to old Raid type

2001-02-25 Thread Suad Musovich
> In the raidtab file where you describe the raid0 arrays, make sure to > say: > > persistent-superblock = 1 Yep, it was already set to 1 (sorry, forgot to write that in my original post) Cheers, Suad -- > > (or whatever the correct systax is). The default is 0 (== no) for > back compat I

Re: MD reverting to old Raid type

2001-02-25 Thread Neil Brown
On Sunday February 25, [EMAIL PROTECTED] wrote: > Linux 2.4.1/RAIDtools2 0.90 > > I have 4 ide disks which have identical partition layouts. > RAID is working successfully, its even booting RAID1. > > I created a RAID5 set on a set of 4 partitions, which works OK. > I then destroyed that set an

Re: Urgent Problem: moving a raid

2001-02-25 Thread Neil Brown
On Sunday February 25, [EMAIL PROTECTED] wrote: > Neil Brown wrote: > > > OK, this time I really want to know how this should be handled. > > > > Well. it "should" be handled by re-writing various bits of raid code > > to make it all work more easily, but without doing that it "could" be > > hand

MD reverting to old Raid type

2001-02-25 Thread Suad Musovich
Linux 2.4.1/RAIDtools2 0.90 I have 4 ide disks which have identical partition layouts. RAID is working successfully, its even booting RAID1. I created a RAID5 set on a set of 4 partitions, which works OK. I then destroyed that set and updated it so it was 2x RAID0 partitions (so I can mirror th

Re: Urgent Problem: moving a raid

2001-02-25 Thread Eyal Lebedinsky
Neil Brown wrote: > > OK, this time I really want to know how this should be handled. > > Well. it "should" be handled by re-writing various bits of raid code > to make it all work more easily, but without doing that it "could" be > handled by marking the partitions as hold raid componenets (0XFE