Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Wed, 6 Apr 2005, Todd Denniston wrote: > Brand new systems, fresh out of the box? Yeah. Dell boxes, but with 3ware SATA controllers instead of the controllers they sell. > A few quick questions: > > 1) have each of the raid 5 arrays gotten finished building themselves? > The drive arrays I got first required time to do some kind of setup. > After I told the drive array that it was raid 5, it took ~4 hours and > the drives were unusable until it was finished. Yup; I made sure to wait until they were done with that. :) > 2) did you know that when you setup drbd against the disks the first > time it has to do a full sync between the drives to get them to the same > state, i.e. all 424334M has to be transferred? This could mean your > mkfs.ext3 is causing the disk to seek between where mkfs is writing and > where drbd is reading (these might be quite a bit apart) and this slows > both down. You might try putting the mkfs to sleep and see what the sync > rate goes to. I also tried sync'ing without running the mkfs.ext3 on them; it was getting better speeds (~15MB/sec), but still not what I'd expect. I think I've got another problem with the drive array config on both systems; I'm working on trying to figure that out now. -- Nate Carlson <natecars at real-time.com> | Phone : (952)943-8700 http://www.real-time.com | Fax : (952)943-8500