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I/O issue when having LUNs from Different Storages Connecting to Same SCSI Host (Doc ID 2125657.1)

Last updated on AUGUST 04, 2018

Applies to:

Linux OS - Version 2.6.18 and later
Linux x86-64
Linux x86

Symptoms

In some deployment, there will be LUNs from different storages attaching to Linux systems.

The following example shows both HITACHI and IBM LUNs connected to same SCSI host1 and host2.

lun001 (360060e8006d367000000d3670000fe0f) dm-6 HITACHI,OPEN-V
size=100G features='1 queue_if_no_path' hwhandler='0' wp=rw
'-+- policy='round-robin 0' prio=1 status=active
|- 1:0:28:0 sdcp 69:208 active ready running
|- 2:0:28:0 sdis 135:192 active ready running
|- 3:0:28:0 sdrr 134:336 active ready running
'- 4:0:28:0 sdye 128:736 active ready running

lun002 (3600507680c808043a800000000000fec) dm-7 IBM,2145
size=520G features='1 queue_if_no_path' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| |- 1:0:0:5 sdl 8:176 active ready running
| '- 2:0:0:5 sdm 8:192 active ready running
'-+- policy='round-robin 0' prio=10 status=enabled
|- 2:0:29:5 sddc 70:160 active ready running
'- 1:0:29:5 sddd 70:176 active ready running

 

Cause

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In this Document
Symptoms
Cause
Solution
References

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