Re: performance limitations of linux raid

2000-05-03 Thread Michael Robinton
The primary limitation is probably the rotational speed of the disks and how fast you can rip data off the drives. For instance, the big IBM drives (20 - 40 gigs) have a limitation of about 27mbs for both the 7200 and 10k rpm models. The Drives to come will have to make trade-offs between dens

Re: performance limitations of linux raid

2000-05-03 Thread Chris Mauritz
> From [EMAIL PROTECTED] Wed May 3 20:38:05 2000 > > Umm, I can get 13,000K/sec to/from ext2 from a *single* > UltraWide Cheeta (best case, *long* reads, no seeks). 100Mbit is only > 12,500K/sec. > > > A 4 drive UltraWide Cheeta array will top out an UltraWide bus > at 40MByte/sec

Re: performance limitations of linux raid

2000-05-03 Thread Christopher E. Brown
On Sun, 23 Apr 2000, Chris Mauritz wrote: > > I wonder what the fastest speed any linux software raid has gotten, it > > would be great if the limitation was a hardware limitation i.e. cpu, > > (scsi/ide) interface speed, number of (scsi/ide) interfaces, drive > > speed. It would be interesting t

RE: Rebuilding a RAID volume

2000-05-03 Thread Martin Munt
> > From: Blair Hicks [SMTP:[EMAIL PROTECTED]] > > Subject:Rebuilding a RAID volume > > So, my question is, what do I need to do in order to rebuild /dev/md2? > and do 'raidhotadd /dev/md' for each md device (for you, N = 0, > 1, 2). 'Raidhotadd' is just a symlink to 'raidstart'. S

RE: Rebuilding a RAID volume

2000-05-03 Thread Michael
> DO NOT change the type on a > partition that's part of a running array. > Hmmm. I've seen this statement many times and must assume it is only partly true. It is very difficult to follow this rule with root mounted raid. I have changed the partition type many times on many systems from

RE: Rebuilding a RAID volume

2000-05-03 Thread Martin Munt
> From: Blair Hicks [SMTP:[EMAIL PROTECTED]] > Sent: Wednesday, May 03, 2000 4:05 PM > To: Linux Raid Support > Subject: Rebuilding a RAID volume > > Hello. I have recently started using the raidtools-0.90 package with RH > 6.1 (2.2.12-20 kernel). So far, I am only using RAID level 1, us

RE: ANNOUNCE - Boot Root Raid + LILO howto has been sent to LDP

2000-05-03 Thread Michael
> I think you meant 'ftp.bizsystems.com'? No, I really mean ftp.bizsystems.net -- the dot com server has not been updated and will be phased out at some point. > > Marco > > > -Original Message- > > From: Michael [SMTP:[EMAIL PROTECTED]] > > Sent: May 2, 2000 4:09 PM > > T

Rebuilding a RAID volume

2000-05-03 Thread Blair Hicks
Hello. I have recently started using the raidtools-0.90 package with RH 6.1 (2.2.12-20 kernel). So far, I am only using RAID level 1, using two identical IDE drives. I have been able to successfully configure my RAID devices. However, I have some questions regarding the correct way to recover

Re: mkraid aborts without any useful info written to syslog

2000-05-03 Thread S . Maréchal
well, everything seems to be well prepared with your raid-1 array - I had the same problem weeks ago - i think you will have to apply the raid-kernel patch ( matching 2.2.14 can be found at http://people.redhat.com/mingo/ ) before making your raid-arry wirth mkraid... sami - Original Messa