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在sas硬盘下安装linux注意的情况
原来装过一台Intel 5000P原装版的服务器，接的就是sas硬盘，发现rhel suse centos debian都装不上，后来找了下intel的官网，发现在sas
下，它们好像支持rhel，suse，提供有软盘驱动的img文件，可现在的服务器哪个还带软驱的？发现可以把img文件copy到USB优盘。装rhel时在
启动加上参数dd，即linux dd，发现可以找到硬盘，顺利安装了。
debina我早些时候看到一个帖子：
http://www.nabble.com/Fwd:-installer-cannot-find-SAS-SCSI-CD-ROM-td16908506.html
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)
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