Fwd: installer cannot find SAS SCSI CD-ROM
Forwarded to debian-boot
---------- Forwarded Message ----------
Subject: installer cannot find SAS SCSI CD-ROM
Date: Wednesday 23 April 2008 01:37
From: Alexandru Munteanu <io_fx@yahoo.fr>
To: debian-testing@lists.debian.org
Hello,
the debian installer fails to find the CD-ROM (and thus to mount it)
on a system having a 'Fusion MPT SAS Host' controller with a SCSI CD-ROM.
The linux kernel module needed for the debian installer to detect and mount
the CD-ROM is 'mptsas', which apparently is not included in the linux image
at boot time.
Here is a workaround hack of how to get the installer to "work" :
Copy the scsi-* 'udeb' files to a usb key :
* mount the debian ISO :
$ mount -o loop debian_image.iso /media/cdrom
* mount the USB key :
$ mount /dev/sdb1 /media/usb1
* copy the scsi* udeb files :
$ cp $(find /media/cdrom/ -name "*scsi*.udeb") /media/usb1/
$ cd /media/usb1
* extract the scsi debian packages :
$ for a in *.udeb;do dpkg -x $a;done
* create a .tar.gz archive :
$ tar czf lib_scsi_sas.tar.gz lib
* unmount the usb key
$ umount /media/usb1
Boot with the Debian CD :
* switch to console 2 with Ctrl+Alt+F2 and then press enter
* mount the usb key :
$ modprobe vfat
$ mkdir /mnt/usb1
$ mount /dev/sde1 /mnt/usb1
$ cd /mnt/usb1/
* extract the SCSI and SAS modules :
$ tar zxf lib_scsi_sas.tar.gz -C /
* update modules dependencies :
$ depmod
* load the required module :
$ modprobe mptsas
* verify that the cd-rom is recognised :
$ dmesg | tail -n 30 | grep "CD-ROM"
...
Uniform CD-ROM driver Revision: 3.20
sr 10:0:0:0: Attaches scsi CD-ROM sr0
* you can test by mounting the cdrom :
$ mkdir /mnt/cdrom && mount /dev/sr0 /mnt/cdrom
$ ls /mnt/cdrom/ && umount /mnt/cdrom
* unmount the usb stick :
$ cd / && umount /mnt/usb1
* switch to console 1 (debian installer) with Ctrl+Alt+F1 and choose
("No", "No", "Continue") "Detect and mount CD" (from the main menu)
Best regards,
--
Alexandru Munteanu
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