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тАО01-30-2007 07:41 PM
тАО01-30-2007 07:41 PM
RSS on EVA8000
I have a customer who wishes to simulate a shelf failure by powering it off to verify availability/redundancy in the DG. Looking at the configuration with Navigator I have the following RSS warning:
RSS #6 has 4 drives that have shelves in common.
Disk 044 loc=(10,02); wwid=2000-0014-C3E6-CC8C; alpa=69;
model=BF14658244; fw=HP02; rss=6.9; size=137; state=good; poid=;
Disk 048 loc=(10,03); wwid=2000-0014-C3E6-CC94; alpa=67;
model=BF14658244; fw=HP02; rss=6.0; size=137; state=good; poid=;
Disk 035 loc=(11,02); wwid=2000-0014-C3E6-BD4E; alpa=7c;
model=BF14658244; fw=HP02; rss=6.8; size=137; state=good; poid=;
Disk 001 loc=(11,03); wwid=2002-000C-CA23-E002; alpa=7a;
model=BF1465A693; fw=HP01; rss=6.1; size=137; state=good; poid=;
Disk Group Disk Count Used Level (%) Alarm Level (%) Used (GB)
Capacity (GB) Oper. State RSS State Req. Spares Cur. Spares
---------- ---------- -------------- --------------- ---------
------------- ----------- --------- ----------- -----------
DG1 80 49 95 5212.62
10658.86 good mirrored single single
DG2 16 90 95 1714.59
1912.99 good parity single single
Ungrouped Disks 4
The graphical representation is attached. My question is will the DG and LUN's/Data contuinue to be available should shelf 10 or 11 be powered down? The DG is all VRAID1.
Thanks in advance for any ideas.
RSS #6 has 4 drives that have shelves in common.
Disk 044 loc=(10,02); wwid=2000-0014-C3E6-CC8C; alpa=69;
model=BF14658244; fw=HP02; rss=6.9; size=137; state=good; poid=;
Disk 048 loc=(10,03); wwid=2000-0014-C3E6-CC94; alpa=67;
model=BF14658244; fw=HP02; rss=6.0; size=137; state=good; poid=;
Disk 035 loc=(11,02); wwid=2000-0014-C3E6-BD4E; alpa=7c;
model=BF14658244; fw=HP02; rss=6.8; size=137; state=good; poid=;
Disk 001 loc=(11,03); wwid=2002-000C-CA23-E002; alpa=7a;
model=BF1465A693; fw=HP01; rss=6.1; size=137; state=good; poid=;
Disk Group Disk Count Used Level (%) Alarm Level (%) Used (GB)
Capacity (GB) Oper. State RSS State Req. Spares Cur. Spares
---------- ---------- -------------- --------------- ---------
------------- ----------- --------- ----------- -----------
DG1 80 49 95 5212.62
10658.86 good mirrored single single
DG2 16 90 95 1714.59
1912.99 good parity single single
Ungrouped Disks 4
The graphical representation is attached. My question is will the DG and LUN's/Data contuinue to be available should shelf 10 or 11 be powered down? The DG is all VRAID1.
Thanks in advance for any ideas.
3 REPLIES 3
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тАО01-30-2007 08:36 PM
тАО01-30-2007 08:36 PM
Re: RSS on EVA8000
Disk Group DG1 has an RSS state of "mirrored" which means there are no disk pairs in a single disk drive enclosure. It is my understanding that the group can survive a power-down.
Disk Group DG2 has an RSS state of "parity" which means that there all disk drives of all RSSes are distributed over all disk drive enclosure. It is a 'better' state, although it does not help as long as there are no VRAID-5 vdisks.
From your data it looks like your customer has a 2C8D EVA, but RSS:6 has more then 8 disks. This prevents the "parity" state on DG1.
Disk Group DG2 has an RSS state of "parity" which means that there all disk drives of all RSSes are distributed over all disk drive enclosure. It is a 'better' state, although it does not help as long as there are no VRAID-5 vdisks.
From your data it looks like your customer has a 2C8D EVA, but RSS:6 has more then 8 disks. This prevents the "parity" state on DG1.
.
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тАО01-30-2007 09:11 PM
тАО01-30-2007 09:11 PM
Re: RSS on EVA8000
Uwe,
Thanks - that's correct it is an EVA2C8D, do you know why or how RSS:6 has been assigned more then 8 disks? Is there a way to address this so that Parity can be achieved?
Thanks - that's correct it is an EVA2C8D, do you know why or how RSS:6 has been assigned more then 8 disks? Is there a way to address this so that Parity can be achieved?
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тАО01-30-2007 09:36 PM
тАО01-30-2007 09:36 PM
Re: RSS on EVA8000
The RSS split/merge code sometimes works less than perfect. As far as I can tell, there is not 'fixup' code in the controller firmware. You _might_ try to get the desired result by ungrouping and regrouping disks, but I would not hold my breath, sorry.
.
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