HP 4400 HP StorageWorks Fabric OS 6.4.0c Release Notes (5697-0703, September 2 - Page 71

Fabric OS 6.4.0c fixes

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Closed defect summary Solution With tape pipelining enabled, AIX host gets a connection timeout error after the first write with tape pipelining enabled. Fixed in Fabric OS 6.4.0b. Workaround prior to upgrade: Disable tape pipelining. There is no way to recover device paths with FICON after CHPID cable pull without slotpoweroff/on of the Multiprotocol Extension Blade or a reboot of the 1606 Extension SAN Switch. Fixed in Fabric OS 6.4.0b. Workaround prior to upgrade: Reboot the Extension SAN Switch or Multiprotocol Extension Blade. Tape devices are intermittently detected as offline by the host during backup. Seen in setup where some physical initiators do not register as FC4 type device and others do. Fixed in Fabric OS 6.4.0b. Unable to disable default zone from Mi10k in IM2 mode after zone merge failure between Mi10k and Fabric OS switches. Fixed in Fabric OS 6.4.0b. 1606 SAN Extension Switch does not support the Path Down function Fixed in Fabric OS 6.4.0b. in IM2 mode. Fabric becomes unstable and segments when one leg of a TI Zone with failover disabled is disrupted. Tape pipelining I/O errors were observed when forcing a drop of last data frame. Fixed in Fabric OS 6.4.0b.tape pipelining I/O errors observed when forcing a drop of last data frame Tape I/O stops when tape pipelining enabled. Fixed in Fabric OS 6.4.0b. Workaround prior to upgrade: Disable/do not enable tape pipelining. Fabric OS 6.4.0c fixes Table 12 lists defects closed in the Fabric OS 6.4.0c firmware release. Table 12 Fabric OS 6.4.0c closed defects Closed defect summary Solution In a setup with 8Gb switches running exchanged base routing policy, routes are not being properly rebalanced after a trunk group loses a member, which could lead to sluggish performance on 8Gb switches if there is a slow drain device using the lower bandwidth link to further congest the fabric. Fixed in Fabric OS 6.4.0c. Workaround prior to upgrade: Keep trunk groups with equal bandwidth. On 8Gb switches, constant link resets occur when a long distance E_Port is configured that requires 128 to 511 credits. These link resets occur continuously with no traffic; a constant stream of C2-5021 indications are seen. Fixed in Fabric OS 6.4.0c. Workaround prior to upgrade: Use OOS mode. Switch panics, blade faults, or switches getting disabled when credit Fixed in Fabric OS 6.4.0c. loss is detected on internal backend port. RASLOG C-5021 or C2-5021 indications are reported. HP StorageWorks Fabric OS 6.4.0c Release Notes 71

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Solution
Closed defect summary
Fixed in Fabric OS 6.4.0b.
Workaround prior to upgrade:
Disable tape pipelining.
With tape pipelining enabled, AIX host gets a connection timeout error
after the first write with tape pipelining enabled.
Fixed in Fabric OS 6.4.0b.
Workaround prior to upgrade:
Reboot the Extension SAN Switch or
Multiprotocol Extension Blade.
There is no way to recover device paths with FICON after CHPID cable
pull without
slotpoweroff/on
of the Multiprotocol Extension Blade
or a reboot of the 1606 Extension SAN Switch.
Fixed in Fabric OS 6.4.0b.
Tape devices are intermittently detected as offline by the host during
backup. Seen in setup where some physical initiators do not register
as FC4 type device and others do.
Fixed in Fabric OS 6.4.0b.
Unable to disable default zone from Mi10k in IM2 mode after zone
merge failure between Mi10k and Fabric OS switches.
Fixed in Fabric OS 6.4.0b.
1606 SAN Extension Switch does not support the Path Down function
in IM2 mode. Fabric becomes unstable and segments when one leg of
a TI Zone with failover disabled is disrupted.
Fixed in Fabric OS 6.4.0b.tape
pipelining I/O errors observed when
forcing a drop of last data frame
Tape pipelining I/O errors were observed when forcing a drop of last
data frame.
Fixed in Fabric OS 6.4.0b.
Workaround prior to upgrade:
Disable/do not enable tape
pipelining.
Tape I/O stops when tape pipelining enabled.
Fabric OS 6.4.0c fixes
Table 12
lists defects closed in the Fabric OS 6.4.0c firmware release.
Table 12 Fabric OS 6.4.0c closed defects
Solution
Closed defect summary
Fixed in Fabric OS 6.4.0c.
Workaround prior to upgrade:
Keep trunk groups with equal
bandwidth.
In a setup with 8Gb switches running exchanged base routing policy,
routes are not being properly rebalanced after a trunk group loses a
member, which could lead to sluggish performance on 8Gb switches
if there is a slow drain device using the lower bandwidth link to further
congest the fabric.
Fixed in Fabric OS 6.4.0c.
Workaround prior to upgrade:
Use OOS mode.
On 8Gb switches, constant link resets occur when a long distance E_Port
is configured that requires 128 to 511 credits. These link resets occur
continuously with no traffic; a constant stream of C2-5021 indications
are seen.
Fixed in Fabric OS 6.4.0c.
Switch panics, blade faults, or switches getting disabled when credit
loss is detected on internal backend port. RASLOG C-5021 or C2-5021
indications are reported.
HP StorageWorks Fabric OS 6.4.0c Release Notes
71