IBM Support

Disk Hot Swap in IBM Power 5107-084 Disk Drawer

Flashes (Alerts)


Abstract

When performing disk hotplug to a device in a 5107-084 disk drawer, the "device" links in sysfs may not get created, preventing the user from correlating the failed device with the enclosure slot.

Content


Linux Releases Affected

  • Red Hat Enterprise Linux 7.3, little endian
  • Ubuntu Server 16.04.1
  • Ubuntu Server 16.04.2

IBM Systems Affected

  • 8001-22C
  • 8001-12C

Affected Hardware

  • 5107-084


Symptoms
When using sysfs to locate the enclosure slot of a specific device, the symbolic link to the enclosure slot, which looks similar to the following, may not exist.

/sys/block/sda/device/enclosure_device:42

This makes it difficult to correlate which block device maps to which enclosure slot to perform service functions such as lighting the slot indicator LED prior to a disk replacement procedure.

Workaround
There is currently no known workaround for this issue. The fix referenced below should be applied to the system.

Fix Outlook

Red Hat has released a fix for this issue in the 3.10.0-514.28.1.el7 kernel.

Canonical has released a fix for this issue in the 4.4.0-98 kernel.

Red Hat bugzilla 1460204
Canonical Launchpad 1693369

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Document Information

Modified date:
25 September 2022

UID

isg3T1025457

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