HP StorageWorks 4000/6000/8000 HP StorageWorks MPX200 Multifunction Router Rel - Page 7

Tcp1323Opts

Get HP StorageWorks 4000/6000/8000 - Enterprise Virtual Arrays PDF manuals and user guides View all HP StorageWorks 4000/6000/8000 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 7 highlights

User-defined bandwidth for a source array cannot be set greater than 400 MB/s with GUI The source array bandwidth setting may be user-defined up to 1600 MB/s. However, the MPX200 manager for Data Migration Services GUI 3.0.1 does not allow a bandwidth greater than 400 MB/s. This will be corrected in a later release. Use the MPX200 CLI migration command set array to set the source array bandwidth greater than 400 MB/s. iSCSI notes iSCSI Initiators may not reconnect following a blade reboot. Cases include firmware update or maintenance. If a blade has been rebooted for any reason, check all the connections of all initiators; a re-login may be required. If maintenance is required for both blades, ensure connections are reestablished to the first blade before proceeding to the next. Mac server sleep mode The ATTO Mac iSCSI Initiator does not support Mac server sleep mode. If sleep mode is enabled, and the Mac server goes to sleep, the initiator can lose iSCSI connectivity to the logical unit numbers (LUNs). If the ATTO Mac iSCSI Initiator is installed, disable Mac server sleep mode. Windows drops the IP connection Certain I/O workloads can cause Windows to drop the IP connection, resulting in removal of a LUN. To restore the IP connection, reboot the system. To avoid dropped connections: • Reduce the I/O workload. • Reduce the application transfer size. Windows iSCSI Initiators must add Tcp1323Opts to registry If you use a method other that the HP StorageWorks MPX200 Multifunction Router Windows software kit to install the Windows iSCSI Initiator, you must manually add the Tcp1323Opts to the registry. Timestamps enable TCP to accurately measure round-trip time (RTT) to adjust retransmission timeouts. The timestamps option provides two 4-byte timestamp fields in the TCP header. One field records the time of the initial transmission; the other field records the time on the remote host. There are two methods to add Tcp1323Opts to the registry. HP recommends that you use the first method. IMPORTANT: When you install the Windows iSCSI initiator from the HP StorageWorks MPX200 Multifunction Router Windows software kit, Tcp1323Opts is added to the registry automatically. Method 1 To enable timestamps, under HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\ Parameters, set the Tcp1323Opts entry to REG_DWORD = 2. MPX200 Multifunction Router Release Notes 7

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
User-defined bandwidth for a source array cannot be set greater than 400 MB/s with GUI
The source array bandwidth setting may be user-defined up to 1600 MB/s. However, the MPX200
manager for Data Migration Services GUI 3.0.1 does not allow a bandwidth greater than 400 MB/s.
This will be corrected in a later release. Use the MPX200 CLI migration command
set array
to set
the source array bandwidth greater than 400 MB/s.
iSCSI notes
iSCSI Initiators may not reconnect following a blade reboot. Cases include firmware update or
maintenance. If a blade has been rebooted for any reason, check all the connections of all initiators;
a re-login may be required. If maintenance is required for both blades, ensure connections are
reestablished to the first blade before proceeding to the next.
Mac server sleep mode
The ATTO Mac iSCSI Initiator does not support Mac server sleep mode. If sleep mode is enabled,
and the Mac server goes to sleep, the initiator can lose iSCSI connectivity to the logical unit numbers
(LUNs).
If the ATTO Mac iSCSI Initiator is installed, disable Mac server sleep mode.
Windows drops the IP connection
Certain I/O workloads can cause Windows to drop the IP connection, resulting in removal of a LUN.
To restore the IP connection, reboot the system. To avoid dropped connections:
•
Reduce the I/O workload.
•
Reduce the application transfer size.
Windows iSCSI Initiators must add
Tcp1323Opts
to registry
If you use a method other that the HP StorageWorks MPX200 Multifunction Router Windows software
kit to install the Windows iSCSI Initiator, you must manually add the
Tcp1323Opts
to the registry.
Timestamps enable TCP to accurately measure round-trip time (RTT) to adjust retransmission timeouts.
The timestamps option provides two 4-byte timestamp fields in the TCP header. One field records the
time of the initial transmission; the other field records the time on the remote host.
There are two methods to add
Tcp1323Opts
to the registry. HP recommends that you use the first
method.
IMPORTANT:
When you install the Windows iSCSI initiator from the HP StorageWorks MPX200 Multifunction Router
Windows software kit,
Tcp1323Opts
is added to the registry automatically.
Method 1
To enable timestamps, under
HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\
Parameters
, set the
Tcp1323Opts
entry to
REG_DWORD = 2
.
MPX200 Multifunction Router Release Notes
7