HP Store Once 4900 Backup Maintenance and Service Guide

Figure 13 Disk labeling for drawer 2
Table 6 Populating disk bays with Capacity Expansion kits
Drawer 2Drawer 1
Add eleven disks to slots 23-33Do not change+ Expansion kit 1
Do not changeAdd eleven disks to slots 12-22+ Expansion kit 2
Add eleven disks to slots 12-22Do not change+ Expansion kit 3
Do not changeAdd eleven disks to slots 1-11+ Expansion kit 4
Add eleven disks to slots 1-11Do not change+ Expansion kit 5
Ordering the correct replacement disk for a failed disk
IMPORTANT: HP strongly recommends replacing a failed disk with a fresh disk from the factory.
Do not substitute a disk from another RAID set.
It is important to identify whether the disk is in the head unit or the attached shelf, because different
disks are used in the two locations and the carriers are different.
Always quote the serial number and product number for the enclosure that contains the failed disk
so that support can replace the correct part.
Table 7 Disk types
Part numberWhere usedDisk
653954-001HP StoreOnce 4900 Backup (2 disks),
head server unit
HP 1TB 7.2K SAS 2.5" SC Hard Disk
Drive
743405-001HP StoreOnce 4900 Backup disk
enclosures
HP 4TB 6G SAS Hard Disk Drive
Identifying when a disk fails
WARNING! It is important to replace a failed or predictive failed disks as soon as possible.
Multiple disk failures within the same array will result in complete data loss.
Note that ALL enclosures of storage must be working for the system to operate; if the RAID fails on
any one enclosure due to exceeding the maximum amount of failed disks in a pool then ALL data
is lost.
26 Disk replacement