Move I/O card from N4000 Turbo slot to Twin Turbo slot

[MoreSawdust]

Damn! Found an A5158A in a slow slot.

The environment: N4000/11.23. The A5158A in question is connected to an FC60; another A5158A is also connected to the same FC60, but it's in a TwinTurbo slot.

What's the best way to fix this, i.e. to move the one A5158A to a TwinTurbo slot? What's the fall-back procedure?

[Steven E. Protter]

Shalom,

Best thing to do is look at the N4000 doc on http://docs.hp.com and make sure the intended destination of the card is supported.

Its kind of an RTFM issue.

SEP

[A. Clay Stephenson · Accepted solution]

I'll assume that this is a non-boot VG (and that you are running LVM rather than VxVM.

The easiest method is to first do a vgexport -s -m /vgxx.map -p /dev/vg05 for all VG's that use this controller.

Now do a vgdisplay -v /dev/vg05 > vg05.safe

Examine the mapfile, /vg05.map and make certain the mapfile is ok.

Now umount the filesystems, and put comments in /etc/fstab.

vgchange -a n /dev/vg05

Now do a vgexport /dev/vg05 # This will really export the VG

Next shutdown and move the card and reboot.

mkdir /dev/vg05
mknod /dev/vg05/group c 64 0x050000
vgimport -s -m /vg05.map /dev/vg05
vgchange -a y /dev/vg05
vgcfgbackup /dev/vg05

edit /etc/fstab and remove your comments and then mount the filesystems.

[Torsten.]

If you have dual pathes to the array, you can vgreduce the path on this card, relocate the card and vgextend again.

On the other hand the support matrix says:

"Maximum supported number of A5158A adapters is limited by the number of available PCI slots in listed system"

http://docs.hp.com/en/10260/FCI-SM-td3.htm

[tkc]

vgreduce the volume group that uses the fc60 array for the path that you want to remove. after vgreduce, you can shutdown the server and move the a5158a card to the slot you want. next, you bring up the server and run ioscan to verify the new device files for the new path. run vgextend command to have the alternate link back to the OS. if you are not so familiar in doing this, it is advisable for you to send us the 'ioscan -fn', 'strings /etc/lvmtab' and 'vgdisplay -v' output to show you the right commands.

[Stefan Stechemesser]

Hi,

the A5158A FC card is supported in any slot of the N-Class.
The N class has two types of PCI slots. 2x and 4x (Turbo) Slots.
All PCI busses have only one PCI card, and are 64 bit wide.

A 2x PCI bus (what you called "slow") is 33 MHz 64 bit wide
=> 33000000*64/8 bytes/sec ~ 251 MBytes/sec

The A5158A FC card is a 1 GBit FC card
=> 128 MB/sec

So it should be no problem to run the A5158A card in a non-turbo slot even with some protocol overhead in reserve.

best regards

Stefan

[MoreSawdust]

Thanks, all.