Failure locations

Global Active Device for VSP One Block

Version

10.5.x

Audience

anonymous

Part Number

MK-23VSP1B011-10

ft:lastEdition

2026-05-04

The following figure and table describe the locations where GAD failures can occur, the SIMs that are issued, and whether the P-VOL and S-VOL are accessible. All GAD-related SIMs are described in SIMs related to GAD.

Figure. Failure locations

#	Failure location		SIM reference codes		GAD volume accessible?¹
#	Failure location		Primary storage system	Secondary storage system	P-VOL	S-VOL
1	Server		None (normal)	None (normal)	Yes	Yes
2	Path between the server and the storage system	Path between the server and the primary storage system	None (normal)	None (normal)	No	Yes²
3	Path between the server and the storage system	Path between the server and the secondary storage system	None (normal)	None (normal)	Yes³	No
4	GAD pair volume	P-VOL	3A0`xxx` DB8`xxx` DB9`xxx` DBA`xxx` DBB`xxx` DD1`xyy` DFA`xxx` DFB`xxx` EF8`xxx` EF9`xxx`	DD1`xyy`	No	Yes²
5	GAD pair volume	S-VOL	DD1`xyy`	3A0`xxx` DB8`xxx` DB9`xxx` DBA`xxx` DBB`xxx` DD1`xyy` DFA`xxx` DFB`xxx` EF8`xxx` EF9`xxx`	Yes³	No
6	Pool for GAD pair⁴	Pool for P-VOL	622`xxx` 62a`xxx` DD1`xyy`	DD1`xyy`	No	Yes²
7	Pool for GAD pair⁴	Pool for S-VOL	DD1`xyy`	622`xxx` 62a`xxx` DD1`xyy`	Yes³	No
8	Path between storage systems	Remote path from the primary to secondary storage system	2180`xx` DD0`xyy`	DD3`xyy`	Yes³	No
9	Path between storage systems	Remote path from the secondary to primary storage system	DD3`xyy`	2180`xx` DD0`xyy`	No	Yes²
10	Storage system	Primary storage system	Depends on the failure type⁵	2180`xx` DD0`xyy` DD3`xyy`	No	Yes²
11	Storage system	Secondary storage system	2180`xx` DD0`xyy` DD3`xyy`	Depends on the failure type⁵	Yes³	No
12	Quorum disk	Path between the primary storage system and quorum disk	21D0`xx` 21D2`xx` DD2`xyy` DEF0`zz` EF5`xyy` EFD000 FF5`xyy`	DD2`xyy`	Yes³	Yes²
13		Path between the secondary storage system and quorum disk	DD2`xyy`	21D0`xx` 21D2`xx` DD2`xyy` DEF0`zz` EF5`xyy` EFD000 FF5`xyy`	Yes³	Yes²
14		Quorum disk	21D0`xx` 21D2`xx` DD2`xyy` DEF0`zz` EF5`xyy` EFD000 FF5`xyy`	21D0`xx` 21D2`xx` DD2`xyy` DEF0`zz` EF5`xyy` EFD000 FF5`xyy`	Yes³	Yes²
15		External storage system	21D0`xx` 21D2`xx` DD2`xyy` DEF0`zz` EF5`xyy` EFD000 FF5`xyy`	21D0`xx` 21D2`xx` DD2`xyy` DEF0`zz` EF5`xyy` EFD000 FF5`xyy`	Yes³	Yes²
Notes: Pairs are not suspended and do not become inaccessible for: Failure in hardware used for redundancy in the storage system, such as drives, cache, channel board (CHB), disk board (DKB), and MPU Failure in redundant physical paths The volume is not accessible if a failure occurs while the S-VOL pair status is COPY, SSUS, or PSUE, and the I/O mode is BLOCK. The volume is accessible if a failure occurs while the S-VOL pair status is PAIR, or SSWS. 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. The volume is accessible if a failure occurs while the P-VOL pair status is PAIR, PSUS, or PSUE, and the I/O mode is Mirror (RL) or Local. A failure occurs due to a full pool for a GAD pair. The SIM might not be viewable, depending on the failure (for example, all cache failure, all MP failure, storage system failure).