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Linux server with “vpath” disks

I recently saw a Linux server connected to an IBM storage with a “vpath” disk. It is because the server uses IBM Subsystem Device Driver.

Reading the IBM System Storage Multipath Subsystem Device Driver (SDD) User’s Guide, I figured how to check the disks

root@linux:~ # datapath query device

Total Devices : 47

DEV#: 0 DEVICE NAME: vpathb TYPE: 2145 POLICY: Optimized Sequential
SERIAL: 600507680191818c1000000000000304
============================================================================
Path# Adapter/Hard Disk State Mode Select Errors
0 Host0Channel0/sda OPEN NORMAL 2059 0
1 Host0Channel0/sday OPEN NORMAL 3761 0
2 Host0Channel0/sdcw OPEN NORMAL 0 0
3 Host0Channel0/sdeu OPEN NORMAL 0 0
4 Host1Channel0/sdgs OPEN NORMAL 3122 0
5 Host1Channel0/sdiq OPEN NORMAL 2949 0
6 Host1Channel0/sdko OPEN NORMAL 0 0
7 Host1Channel0/sdmm OPEN NORMAL 0 0

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