Each of the attached Lenovo Storage V series 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 number allowed by the
Lenovo Storage V series system. The following websites provide the
most current information about maximum configuration for the
Lenovo Storage V series system:
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...
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/sda
Figure 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