# Failure location
SIM reference codes
GAD volume
accessible?
1
Primary
system
Secondary
system
P-VOL S-VOL
13 Path between the
secondary system and
quorum disk
DD2XYY 21D0XX
21D2XX
DD2XYY
DEF0ZZ
EF5XYY
EFD000
FF5XYY
Yes
3
No
14 Quorum disk 21D0XX
21D2XX
DD2XYY
DEF0ZZ
EF5XYY
EFD000
FF5XYY
21D0XX
21D2XX
DD2XYY
DEF0ZZ
EF5XYY
EFD000
FF5XYY
Yes
3
No
15 External storage
system
21D0XX
21D2XX
DD2XYY
DEF0ZZ
EF5XYY
EFD000
FF5XYY
21D0XX
21D2XX
DD2XYY
DEF0ZZ
EF5XYY
EFD000
FF5XYY
Yes
3
No
Notes:
1. Pairs are not suspended and do not become inaccessible for:
¢
Failure in hardware used for redundancy in the VSP G1000, such as HDD, cache, CHA, DKA, and
MPB
¢
Failure in redundant physical paths
2. The volume is not accessible if a failure occurs while the S-VOL pair status is COPY, SSUS, or PSUE.
3. The volume is not accessible if a failure occurs while the P-VOL pair status is PSUS or PSUE and the
I/O mode is BLOCK.
4. A failure occurs due to a full pool for a GAD pair.
5. The SIM might not be viewable, depending on the failure (for example, all cache failure, all MP
failure, storage system failure).
Related topics
• SIMs related to GAD on page 6-6
• Pair condition and recovery: server failures on page 6-8
• Pair condition and recovery: path failure between the server and storage
system on page 6-8
Disaster recovery of global-active device
6-5
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide
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