SerialSCSI-00 (sasd) B.11.31.1003 Mass Storage Driver Release Notes, Edition 2 (June 2010)

NOTE: If you remove the dynamically loaded sasd driver while it is in use, or if you remove

the statically loaded sasd driver at any time, you must perform a reboot. This is normal

behavior under these conditions and is not affected by patch PHCO_36356.

• System panic when downgrading the sasd driver.

CAUTION: Installing an older version of the sasd driver downgrades the adapter firmware.

This can cause RAID volumes in the system to become degraded. HP recommends that you

back up important data before downgrading the adapter firmware.

If you install an older version of the sasd driver and version B.11.31.0712 is installed, the

system panics with the following stack trace:

panic: post_hndlr(): Unresolved kernel interruption

Stack Trace:

IP Function Name

0xe0000000005a95e0 post_hndlr+0xcc0

0xe0000000005a8460 vm_hndlr+0x220

0xe000000000d90780 bubbledown

0xe000000000713610 spp_remove_from_list+0xf0

0xe000000000713240 spp_alloc+0xd0

0xe0000000007137a0 kmem_lpc_alloc+0x100

0xe000000000713a00 kalloc_internal+0x90

0xe00000000073bbf0 alloc_mem+0x90

0xe00000000073bf10 get_kmem+0x130

0xe00000000073c260 kmem_arena_refill+0x110

0xe0000000006ebf70 kmem_arena_varalloc+0x1f0

0xe00000000118eba0 ipmi_init+0x1c0

0xe0000000009e28b0 isc_table_traverse+0x1e0

0xe0000000009dbfa0 wsio_init_end+0x40

0xe000000000c7d320 io_virt_mode_config+0x1c0

0xe0000000017716b0 DoCalllist+0x3a0

End of Stack Trace

This problem happens on HP Integrity rx2600, rx3600, rx6600, BL860c systems, and on rx7640

and rx8640 systems with AH303A adapters installed.

Corrective Action: Reboot the system to recover from the panic.

5 Recommendations

This section provides recommendations for highest performance and reliability.

• Updating Physical Disk Firmware

Consider the following when you use sasmgr(1M) to update the firmware of physical disks

that are part of a RAID volume attached to an HP 8 Internal Port SAS Controller:

— If you are updating the firmware on two or more disks that are part of a RAID volume,

do not issue multiple commands to download simultaneously.

— If the disk firmware download to a disk that is part of a RAID volume fails or is

terminated, reset the controller using the sasmgr(1M) reset command:

sasmgr -f reset -D /dev/sasdX