MPxIO Support for Toshiba Internal SAS Hard Disk Drives Prevents Rollback to Any Older Version of Oracle Solaris (15824482)

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MPxIO Support for Toshiba Internal SAS Hard Disk Drives Prevents Rollback to Any Older Version of Oracle Solaris (15824482)

Starting with Oracle Solaris 11.2, Solaris multipathing supports Toshiba hard disk drives with the following product IDs:

AL13SEB600
MBF2600RC
MK1001GRZB
MK2001GRZB

After updating to Oracle Solaris 11.2 and rebooting to the new boot environment, you cannot roll back to your older version of Oracle Solaris. The following error message is displayed:

root@smem10a:~# beadm activate S11U1SRU20B04-z_stress-2.10-1

Error while accessing "/dev/rdsk/c2t500003942823F352d0s0": 
No such file or directory
Unable to activate S11U1SRU20B04-z_stress-2.10-1.
Error installing boot files.

Workaround: Choose one of the following workarounds:

Roll back to the older version of Oracle Solaris by using Open Boot PROM (OBP) or GRand Unified Bootloader (GRUB).
- On SPARC systems, list all available boot environments in the OBP mode and then boot the root file system for the specified boot environment.
```
{0} ok boot -L
```
```
{0} ok boot -Z rpool/ROOT/boot-environment
```
  For information about booting boot environments on SPARC, see Booting From an Alternate Operating System or Boot Environment in Booting and Shutting Down Oracle Solaris 11.2 Systems.
- On x86 systems, in the GRUB menu, manually select the OS version to boot instead of the default version selected by GRUB.
Disable MPxIO configuration for the specific HBA port that is connected with the TOSHIBA disk. For more information about disabling MPxIO, see the stmsboot (1M) man page.