HP AA HP Netserver 4000 Reference Guide

Ch 5: System Upgrades
Network Server Division
5-5
installation of the Marathon array and should still be available. If
not, take the time to document it now:
• How many physical drives are present in the LH3 or LH4.
• What are the RAID set configurations for the drives?
• What logical drive is used for the IOP NOS?
• What logical drive is used for the CE?
• What other logical drive sets are redirected?
• What are the 4-digit SCSI ids of all logical drives?
Install the additional storage
Install the new drives into the disk enclosure and create the new
RAID sets using the NetRAID Assistant on IOP1 and IOP2. Make
sure to configure them exactly the same.
Caution should be taken here to not touch the other RAID sets that
are present. Doing this will cause damage to your data and may
possibly bring down the whole array. Simply use the NetRAID
Assistant to configure the new drives.
Decision time
At this point the question about downtime comes into play. A reboot
is required before Windows NT will recognize the newly created
drive.
If the whole system can be down for awhile, then it is best to down
the whole array at this time and restart both IOPs into offline mode
where configuration of the disks can be completed under NT Disk
Administrator.
If downtime cannot be tolerated then only one IOP can be brought
down at this time and rebooted into offline mode. Once this system
is complete, it can be brought back online. When this is done, a re-
mirror will begin and must complete before the second IOP can be
brought down and booted to offline mode for the new disk to be
configured.
Reboot the IOP
This is the first of two required reboots. This reboot is necessary for
Windows NT to recognize the new disks.
Configuring the new mirrored drive
Once the IOP is booted to offline mode, launch the Windows NT
Disk Administrator.