Storage configuration for hosts that run the Linux operating system
Each of the attached IBM Spectrum Virtualize™ system LUNs has a special device file in the Linux directory /dev.
Hosts that use Linux 2.4 kernel operating systems have a maximum of 128 disks that are based on the major numbers that are available. The entries for all 128 devices are added by the operating system automatically.
Linux hosts can have as many disks as the IBM Spectrum Virtualize system allows. The following website provides the most current information about configuration maximums:
The range of devices for each type of kernel follows.
- Device range without a subsystem device driver (SDD)
- /dev/sda to /dev/sddx
- Device range with an SDD
- Linux 2.4 kernel operating
systems have the following range:
- /dev/vpatha, vpathb...vpathp
- /dev/vpathaa, vpathab...vpathap
- /dev/vpathba, vpathbb...vpathbp...
- /dev/vpathza, vpathzb...vpathzp
- /dev/vpathaaa, vpathaab...vpathaap...
- Linux 2.6 kernel operating
systems have the following range:
- /dev/vpatha, vpathb...vpathz
- /dev/vpathaa, vpathab...vpathaz
- /dev/vpathba, vpathbb...vpathbz...
- /dev/vpathza, vpathzb...vpathzz
- /dev/vpathaaa, vpathaab...vpathaaz...
- Linux 2.4 kernel operating
systems have the following range:
Figure 1. Example of range of devices for a host that is running the Linux operating system when not using the SDD
# ls –l /dev/sda
brw-rw---- 1 root disk 8, 0 Aug 24 2005 /dev/sdaFigure 2. Example of range of devices for a host that is running the Linux operating system when using the SDD
# ls –l /dev/vpatha
brw-rw---- 1 root disk 8, 0 Aug 24 2005 /dev/vpatha