Linux Installation and Configuration Guide for AlphaServer | 79 |
Appendix C
SCSI and IDE Configurations
SCSI Only
Depending on the configuration, your internal drives may be either dkax or dkbx - where x is the value assigned by the SRM console (i.e. dkb100). Usually, the SCSI CDROM is on its own controller/channel, so the SRM will usually report it as dka500 or dkb500. Disks will be on the other controller (for exmaple dka500 is an RRD46 - a SCSI CDROM, then dkb0 would be the first SCSI harddrive - possibly
Mixed - IDE and SCSI
On the AlphaServer DS10, ES40 and AlphaStation XP1000, the CDROM is IDE based, so the device information passed in the "root=/dev/devicename" has several possibilities. If you check the configuration under SRM console prompt (>>>show config more), you should find the IDE devices under dqa and dqb device names. The following table is useful to map IDE SRM device names to the Linux device name used for the same device.
SRM console | Linux device |
dqa0 | hda |
dqa1 | hdb |
dqb0 | hdc |
dqb1 | hdd |
Adding a second drive to your system
This section provides an example of how perform the partitioning process using fdisk in order to add a second drive to the system. The disk used for this example is an 18.2GB drive
To perform the partitioning operation on the second disk, follow these steps:
1.Open a terminal window and issue the following command; # fdisk /dev/TdZ (where T is the type of drive, s for SCSI or h for IDE; and Z is the letter of the drive you are booting; ex: dka0=sda, dqa0=hda)
2.Type “m” for help.
3.Type “p” to print the partition table.
4.If there is partition information already configured for the disk, you will need to delete it using the “d” option. Please be sure that you want to zero out this drive. All data will be lost on the drive doing this.
5.Type “b” to edit the BSD disklabel.
6.If you completed the last step correctly, you should see the following: “/tmp/TdZ contains no disklabel. Do you want to create a disklabel? (y/n)” – Answer Y.
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