APC SGI 15000 RAID - Manual (Page 33)

Controller Installation
007-5510-002 19
2.3.6 Checking Tier Status and Configuration
Use the tier command to display your current tier status. Figure 2–5 illustrates the status of a system
containing 80 drives on 8 tiers with both parity modes of 8+1 and 8+2 tiers. The plus sign (+) adjacent
to the tier number indicates that the tier is in 8+2 mode.
Figure 2–5 Tier Status Screen
Each letter under the “Disk Status” column represents a healthy drive at that channel (as shown in Figure
2–5). Verify that all drives can be seen by the controller.
“Unhealthy” drives appear as follows:
• A blank space indicates that the drive is not present (or detected) at that location.
• A period (.) denotes that the disk was failed by the system.
• A question mark (?) indicates that the disk has failed the diagnostics tests or is not configured
correctly.
• The character “r” indicates that the disk at that location is being replaced by a spare drive.
After entering the tier command, perform the following steps if necessary:
1. If a drive is not displayed at all (that is, it is “missing”), check to ensure that the drive is properly
seated and in good condition. To search for the drive, enter:
disk scan
2. If the same channel is missing on all tiers, check the cable connections for that channel.
3. If “automatic disk rebuilding” is not enabled, enable it by entering:
tier autorebuild=on
4. To display the detailed disk configuration information for all of the tiers (Figure 2–6) enter:
tier config
Tier Status
Space Available
(Mbytes) Tier Disk Status Lun List
Capacity
(Mbytes)
ABCDEFGHPS
-----------------------------------------------------------------
280012 280012 1 +
ABCD FGHPS 280012 280012 2
ABCDEFGHPS 280012 280012 3
Automatic disk rebuilding is Enabled
15000 [1]: tier
ABCDEFGHPS 280012 280012 4
AB.DEFGHPS 280012 280012 5
System rebuild extend: 32 Mbytes
System rebuild delay: 60
System Capacity 2240096 Mbytes, 2240096 Mbytes available.
Owner
1
1
1
1
1
ABCDEFGHPS 280012 280012 6 + 1
ABCDEFG?PS 280012 280012 7 1
ABCDEFGHPS 280012 280012 8 + 1