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Chapter 3

Notes

3.3

LVM Notes

Combination of devices

Maximum link speed of Fibre Channel

card

4Gbit/s

2Gbit/s

When connecting to a 1Gbit/s-only Fibre Channel card, the "Automatic" (default) Fibre Channel switch port

link speed must be used.

If the devices being connected together both have automatically set link speeds, the resulting link speed

may be less than optimal. The default link speed setting for Fibre Channel switch ports is "Automatic". The

link speed setting of a true HP Fibre Channel card cannot be changed to other than "Automatic", so the

Fibre Channel switch port link speeds must be fixed to match the actual speed of the server-side Fibre

Channel cards, as per the above table, so that the same link speed is always used.

Set AD355A and AD299A Fibre Channel card connected Fibre Channel switch ports to not LinkUp via the L-

•

Port. This is because AD355A and AD299A Fibre Channel cards do not support PublicLoop LinkUp, and this

setting prevents them from attempting to do so.

Example:

When an AD355A is connected to switch port 4 of an ETERNUS SN200 series, execute the following com-

mand to disable LinkUp via the L-Port on port 4:

portCfgGPort 4 1

3.3

LVM Notes

A mirrored LVM configuration using the ETERNUS AF/DX storage systems' LUNs is not recommended.

•

[Bad Block Relocation] attribute must be disabled on LVM Logical volume which resides on the ETERNUS

•

AF/DX storage systems' LUNs.

Example:

# lvchange -r N /dev/vg01/lvol_name

Execute this command for all logical volumes created on ETERNUS AF/DX storage systems' LUNs to disable

[Bad Block Relocation]. If [Bad Block Relocation] is not disabled, file system may be damaged.

Raw device access to an LVM logical volume must use an I/O block size that is a multiple of 1024bytes.

•

FUJITSU Storage ETERNUS AF, ETERNUS DX Configuration Guide -Server Connection- (Fibre Channel) for HP-UX

Maximum link speed of Fibre Channel

switch

32Gbit/s

16Gbit/s

8Gbit/s

4Gbit/s

2Gbit/s

32Gbit/s

16Gbit/s

8Gbit/s

4Gbit/s

2Gbit/s

Set the Fibre Channel switch port link

speed to...

—

4Gbit/s fixed

2Gbit/s fixed

—

2Gbit/s fixed

P3AM-3772-22ENZ0