HP LH4r HP Netserver Service Handbook, Volume 3 - High-End - Page 46

Hot Replacement of PCI Hot Plug Boards

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On-board SCSI consists of two channels, A and B. Channel A controls the HP NetServer's internal hard disk drives. Channel B handles the server's external SCSI port. On each SCSI channel, the server scans for a boot device starting at device ID 0 and works up from there. Hot Replacement of PCI Hot Plug Boards To replace one PCI Hot Plug board with another while the server is running, you must: • Turn off power to the slot through your server's NOS. If you are a Windows NT 4.0 user, choose Programs from the Start menu, then select PCI Hot Plug from the Programs menu. • Physically remove the hot plug board and replace it with another. CAUTION Never remove a PCI Hot Plug board from a hot-plug slot without first powering down the slot through software. Doing so interferes with the operation of the board's Hot Plug driver. As a consequence, the board will not resume I/O operation when replaced. Also, you will not be able to power up the slot again through software. If the board in a Hot Plug slot does not have Hot Plug drivers, you cannot power it down through software. Do not remove the board while the server is running. Reading Hot Plug PCI Slot LEDs to Determine Slot Status Green LED Amber LED Indicates This Status On Off Power to the slot is on, and the slot is operating normally. Do not remove the board from the slot. On On Power to the slot is on, but the slot needs attention. Do not remove the board from the slot. Off On Power to the slot is off, and the slot needs attention. You can remove the board from this slot. Off Off Power to the slot is off. You can remove the board from this slot. NOTE If you have a non-hot-plug board in one of the hot-plug slots, the board will show up on the interface. But the interface will not allow you to power down the board's slot If you do not replace the Hot Plug bracket, you cannot power up the slot again. 40

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40
On-board SCSI consists of two channels, A and B. Channel A controls the HP NetServer's internal hard disk
drives. Channel B handles the server's external SCSI port.
On each SCSI channel, the server scans for a
boot device starting at device ID 0 and works up from there.
Hot Replacement of PCI Hot Plug Boards
To replace one PCI Hot Plug board with another while the server is running, you must:
•
Turn off power to the slot through your server’s NOS. If you are a Windows NT 4.0 user,
choose
Programs from the Start menu, then select PCI Hot Plug from the Programs menu.
•
Physically remove the hot plug board and replace it with another.
CAUTION
Never remove a PCI Hot Plug board from a hot-plug slot without first powering
down the slot through software. Doing so interferes with the operation of the board's
Hot Plug driver. As a consequence, the board will not resume I/O operation when
replaced.
Also, you will not be able to power up the slot again through software.
If
the board in a Hot Plug slot does not have Hot Plug drivers, you cannot power it
down through software.
Do not remove the board while the server is running.
Reading Hot Plug PCI Slot LEDs to Determine Slot Status
Green
LED
Amber LED
Indicates This Status
On
Off
Power to the slot is on, and the slot is operating normally.
Do not remove
the board from the slot.
On
On
Power to the slot is on, but the slot needs attention.
Do not remove the
board from the slot.
Off
On
Power to the slot is off, and the slot needs attention.
You can remove the
board from this slot.
Off
Off
Power to the slot is off.
You can remove the board from this slot.
NOTE
If you have a non-hot-plug board in one of the hot-plug slots, the board will show up
on the interface. But the interface will not allow you to power down the board's slot
If
you do not replace the Hot Plug bracket, you cannot power up the slot again.