HP 4400 HP StorageWorks Fabric OS 6.4.1 Release Notes (5697-0760, November 201 - Page 73

Fabric OS 6.4.0c fixes

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Closed defect summary Solution 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 Fixed in Fabric OS 6.4.0b. data frame. Tape I/O stops when tape pipelining is enabled. Fixed in Fabric OS 6.4.0b. Workaround prior to upgrade: Disable, or 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. This can 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 is seen. Fixed in Fabric OS 6.4.0c. Workaround prior to upgrade: Use OOS mode. Switch panics, blade faults, or switches are getting disabled when credit loss is detected on internal backend port. RASLOG C-5021 or C2-5021 indications are reported. Fixed in Fabric OS 6.4.0c. FCIP tunnel bounces on workload start, causing traffic disruption. Fixed in Fabric OS 6.4.0c. Workaround prior to upgrade: Enable some sort of FICON emulation (XRC or Tape Read/Write Pipelining). When Lossless DLS is enabled, HA failover cause newly active CP to Fixed in Fabric OS 6.4.0c. disable the switch or cause switch panic. If switch is disabled, the ports remain disabled and the user has to enable the switch manually. The Haenable command is not auto rebooting the standby CP when the standby CP is removed and reseated or replaced. As a result, the active and backup CP end up out of synch. Fixed in Fabric OS 6.4.0c. Workaround prior to upgrade: Reboot the standby CP manually. During tape reads, dropping the first and middle data frames results in Fixed in Fabric OS 6.4.0c. a connection timeout error, while dropping the last frame results in a hung host. HP StorageWorks Fabric OS 6.4.1 Release Notes 73

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Solution
Closed defect summary
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 were observed when forcing a drop of last
data frame.
Fixed in Fabric OS 6.4.0b.
Workaround prior to upgrade:
Disable, or do not enable tape
pipelining.
Tape I/O stops when tape pipelining is 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. This can 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
is seen.
Fixed in Fabric OS 6.4.0c.
Switch panics, blade faults, or switches are getting disabled when
credit loss is detected on internal backend port. RASLOG C-5021 or
C2-5021 indications are reported.
Fixed in Fabric OS 6.4.0c.
Workaround prior to upgrade:
Enable some sort of FICON
emulation (XRC or Tape Read/Write
Pipelining).
FCIP tunnel bounces on workload start, causing traffic disruption.
Fixed in Fabric OS 6.4.0c.
When Lossless DLS is enabled, HA failover cause newly active CP to
disable the switch or cause switch panic. If switch is disabled, the ports
remain disabled and the user has to enable the switch manually.
Fixed in Fabric OS 6.4.0c.
Workaround prior to upgrade:
Reboot the standby CP manually.
The
Haenable
command is not auto rebooting the standby CP when
the standby CP is removed and reseated or replaced. As a result, the
active and backup CP end up out of synch.
Fixed in Fabric OS 6.4.0c.
During tape reads, dropping the first and middle data frames results in
a connection timeout error, while dropping the last frame results in a
hung host.
HP StorageWorks Fabric OS 6.4.1 Release Notes
73