Jukka Salmi --> debian-user (2008-12-07 16:27:57 +0100): > Hello, > > Sven Joachim --> debian-user (2008-12-05 17:54:56 +0100): > > On 2008-12-05 17:27 +0100, Jukka Salmi wrote: > > > > > I just installed Debian 4.0r5 on a i386 systems (Dell PowerEdge 2950). > > > While the installer seemed to have succeeded without problems, the > > > freshly installed system didn't boot because its root file systems could > > > not be found: > > > > > > Begin: Waiting for root file system... ... > > > [...] > > > sd 3:0:0:0: Attached scsi removable disk sdb > > > > > > At this point the system hanged for some minutes, until > > > > > > ALERT! /dev/sdb3 does not exist. Dropping to a shell! > > > > > > was output and the BusyBox shell was executed. > > > > > > But indeed there is no /dev/sdb; there's only one (logical) disk > > > present, /dev/sda. > > > > How many physical discs does the system have (removable and > > non-removable)? > > The system has three SCSI disks, but since they are connected to a RAID > controller to form a RAID 5 the OS should see just a single disk. > > BTW, I see the same problem on another i386 system (also a PowerEdge > 2950). It has six SCSI disks, four of which form a RAID 1+0, and two a > RAID 1. The installer sees /dev/sd[abc], but after the system is > installed the disk which was sdc became sdb, and the original sdb became > sda. > > I should probably find out what sda is... I can try this tomorrow.
The installer kernel prints (hand-typed): [...] Vendor: Dell Model: Virtual CDROM Rev: 123 Type: CD-ROM ANSI SCSI revision: 00 Vendor: Dell Model: Virtual Floppy Rev: 123 Type: Direct-Access ANSI SCSI revision: 00 usb-storage: device scan complete usb-storage: device scan complete sr0: scsi-1 drive sr 0:0:0:0: Attached scsi CD-ROM sr0 sr 0:0:0:0: Attached scsi generic sg0 type 5 scsi 1:0:0:0: Attached scsi generic sg1 type 0 sd 1:0:0:0: Attached scsi removable disk sda floppy0: no floppy controllers found [...] Hmm, is sda this "Virtual Floppy"? What's this? And what's a "Virtual CDROM"? (There's an ATAPI CD-ROM connected to the system, but no floppy drive.) However, the real disk later (as soon as the installer menu "detect disks" is selected) attaches as sdb: [...] scsi3 : LSI Logic SAS based MegaRAID driver [...] scsi 3:0:32:0: Attached scsi generic sg2 type 13 Vendor: DELL Model: PERC 6/i Rev: 1.21 Type: Direct-Access ANSI SCSI revision: 05 SCSI device sdb: 570949632 512-byte hdwr sectors (292326 MB) [...] sd 3:2:0:0: Attached scsi disk sdb sd 3:2:0:0: Attached scsi generic sg3 type 0 [...] What seems to be the problem is the order in which those devices attach. After installation and the following restart, the new kernel boots as follows: [...] scsi0 : LSI Logic SAS based MegaRAID driver [...] Vendor: DELL Model: PERC 6/i Rev: 1.21 Type: Direct-Access ANSI SCSI revision: 05 [...] SCSI device sda: 570949632 512-byte hdwr sectors (292326 MB) [...] sd 0:2:0:0: Attached scsi disk sda [...] Vendor: Dell Model: Virtual Floppy Rev: 123 Type: Direct-Access ANSI SCSI revision: 00 Vendor: Dell Model: Virtual CDROM Rev: 123 Type: CD-ROM ANSI SCSI revision: 00 usb-storage: device scan complete sd 3:0:0:0: Attached scsi removable disk sdb usb-storage: device scan complete sr0: scsi-1 drive sr 2:0:0:0: Attached scsi CD-ROM sr0 scsi 0:0:32:0: Attached scsi generic sg0 type 13 sd 0:2:0:0: Attached scsi generic sg1 type 0 sr 2:0:0:0: Attached scsi generic sg2 type 5 sd 3:0:0:0: Attached scsi generic sg3 type 0 floppy0: no floppy controllers found [...] Hmm, this is a little bit scary because I don't understand how the kernel choses the order of attaching devices. Can this be made static somehow? I.e. can I somehow configure the kernel to always recognise the SCSI RAID controller as scsi0? > > the installed system? > > I don't remember which version they were exactly (something like > 2.6.18?), but calling uname(1) from an installer shell and from the > installed system's shell both showed the same release version. Installer kernel: ~ # uname -a Linux (none) 2.6.18-6-486 #1 Sat Jan 26 08:50:43 UTC 2008 i686 unknown Installed kernel: debian:~# uname -a Linux debian 2.6.18-6-686 #1 SMP Mon Oct 13 16:13:09 UTC 2008 i686 GNU/Linux Regards, Jukka -- bashian roulette: $ ((RANDOM%6)) || rm -rf ~ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]