On Thu, 2004-04-29 at 09:29, Jeff Vian wrote: > Götz Reinicke wrote: > > > > > > > Alexander Dalloz schrieb: > > > >> Am Do, den 29.04.2004 schrieb Götz Reinicke um 12:07: > >> > >> > >>> Hi, > >>> > >>> I have an Dell PE 1650 Server with an internal perc 3/di SCSI RAID > >>> Controller hosting a RAID 1 and an Adaptec 29160 Controller hosting > >>> an external Hardware RAID-Box. > >>> > >>> If I boot, and try to install Fedora, the external RAID is seen as > >>> sda, the internal RAID as sdb. > >>> > >>> How can I change this order, so that the internal RAID is sda and > >>> the external RAID is sdb? Any ideas? > >>> > >>> > >>> Regards > >>> > >>> Götz Reinicke > >> > >> > >> > >> Just change the SCSI ID of the RAID arrays/drives. The lowest is sda, > >> the second... Remembering your previous post about difficulties with an > >> external SCSI driver array of SATA drives I guess you can specify the > >> SCSI ID for the whole external box. > > > > > > I do have different IDs, 0 for the internal RAID, 1 for the external > > RAID-Box. The later is attached to a different SCSI Controller. > > > > But the external Box is seen as sda :-( > > > This is because of the sequence in which the cards are seen/configured > on the PCI bus, as well as the scsi bus ID sequence. The scsi ID is not > the only thing it looks at to decide what name it gives the drive. > > The general rule to decide what device gets what name is first > configured controller, scsi id sequence on that bus, then next > configured controller, scsi id sequence on that bus, etc. > > Thus, you can have a controller in pci slot 1 and another in slot 3. If > the controller in slot 3 is configured first its drives take precedence > over those on the controller in slot 1. > > If you have devices on a single controller, AFAIK they will always get > configured in id sequence. > This can become a problem if you leave gaps in the scsi IDs then later > add another device that fills that ID slot. the drives at the later IDs > will get the name changed. > > For example, you have a single scsi drive at ID 4. this will by default > be named sda. Then you add another drive at ID 0. Now that new drive > will be sda and the original becomes sdb. This effect can be a bit > disconcerting at times if not expected. > > > > > so long... > > ...Götz Have you considered labels for the drives? -- jludwig <wralphie@xxxxxxxxxxx>
