HP NetServer AA 4000 HP AA HP Netserver 4000 Reference Guide - Page 91

Adding SCSI Devices HBA's, HP NetRAID

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Ch 5: System Upgrades The best method for modifying the Marathon configuration is to make the modifications on one IOP, save it and copy to the other IOP. Reboot the array At this point everything is ready. A final reboot of the entire array is necessary for the disks to be redirected to the CEs. Confirm the new drives on the CE Open Windows Explorer and examine the new drive. Adding SCSI Devices (HBA's, HP NetRAID) Since this operation requires the installation of hardware the IOP must be brought down. Once again the decision must be made to bring down the whole array for a period of time and forgo any remirroring operations or bring down the IOPs one at a time and suffer the re-mirror operations. When adding SCSI devices care must be taken not to affect the present 4 digit SCSI ID settings of the existing devices. Adding a SCSI device in a higher order on the SCSI bus scan will cause lower order devices to shift the 4 digit SCSI ID settings. If this occurs the Marathon Configuration will be corrupt and will have to be recreated. It is not necessary to install duplicate devices in both IOPs unless those devices will be used to control mirrored disks, as in the case of a NetRAID controller. It is okay to add an HBA for backup purposes without adding a matching one in the other IOP. Once again, care should be taken to ensure all existing mirrored device 4 digit SCSI IDs are not affected by the addition of the device. Network Server Division 5-9

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Ch 5: System Upgrades
Network Server Division
5-9
The best method for modifying the Marathon configuration is to
make the modifications on one IOP, save it and copy to the other
IOP.
Reboot the array
At this point everything is ready.
A final reboot of the entire array is
necessary for the disks to be redirected to the CEs.
Confirm the new drives on the CE
Open Windows Explorer and examine the new drive.
Adding SCSI Devices (HBA's, HP NetRAID)
Since this operation requires the installation of hardware the IOP
must be brought down.
Once again the decision must be made to
bring down the whole array for a period of time and forgo any re-
mirroring operations or bring down the IOPs one at a time and suffer
the re-mirror operations.
When adding SCSI devices care must be taken not to affect the
present 4 digit SCSI ID settings of the existing devices.
Adding a
SCSI device in a higher order on the SCSI bus scan will cause lower
order devices to shift the 4 digit SCSI ID settings.
If this occurs the
Marathon Configuration will be corrupt and will have to be
recreated.
It is not necessary to install duplicate devices in both IOPs unless
those devices will be used to control mirrored disks, as in the case of
a NetRAID controller.
It is okay to add an HBA for backup
purposes without adding a matching one in the other IOP.
Once
again, care should be taken to ensure all existing mirrored device 4
digit SCSI IDs are not affected by the addition of the device.