Smart Array setup: 1+0 or 0+1

ebinhee — Sat, 08 Jun 2013 06:23:15 GMT

We have one Blade server BL460C G7. The below is the output from hpacucli

Smart Array P410i in Slot 3
Bus Interface: PCI
Slot: 3
Serial Number: 5001438010BD9338
Cache Serial Number: PBLJK0ATAZT0AX
RAID 6 (ADG) Status: Disabled
Controller Status: OK
Hardware Revision: C
Firmware Version: 5.70
Rebuild Priority: Medium
Expand Priority: Medium
Surface Scan Delay: 3 secs
Surface Scan Mode: Idle
Queue Depth: Automatic
Monitor and Performance Delay: 60 min
Elevator Sort: Enabled
Degraded Performance Optimization: Disabled
Inconsistency Repair Policy: Disabled
Wait for Cache Room: Disabled
Surface Analysis Inconsistency Notification: Disabled
Post Prompt Timeout: 15 secs
Cache Board Present: True
Cache Status: OK
Cache Ratio: 25% Read / 75% Write
Drive Write Cache: Disabled
Total Cache Size: 1024 MB
Total Cache Memory Available: 912 MB
No-Battery Write Cache: Disabled
Cache Backup Power Source: Capacitors
Battery/Capacitor Count: 1
Battery/Capacitor Status: OK
SATA NCQ Supported: True

Array: A
Interface Type: SAS
Unused Space: 0 MB
Status: Failed Physical Drive
Array Type: Data

One of the drives on this array have failed or has been removed.

Logical Drive: 1
Size: 820.2 GB
Fault Tolerance: 1+0
Heads: 255
Sectors Per Track: 32
Cylinders: 65535
Strip Size: 256 KB
Full Stripe Size: 1536 KB
Status: Interim Recovery Mode
Caching: Enabled
Unique Identifier: 600508B1001C60778840CB73649D13C7
Disk Name: /dev/cciss/c0d0
Mount Points: /opt/TimesTen/tt_transaction_log 820.2 GB
OS Status: LOCKED
Logical Drive Label: A038CCE35001438010BD9338EFB1
Mirror Group 0:
physicaldrive 1I:1:1 (port 1I:box 1:bay 1, SAS, 146 GB, OK)
physicaldrive 1I:1:2 (port 1I:box 1:bay 2, SAS, 146 GB, OK)
physicaldrive 1I:1:3 (port 1I:box 1:bay 3, SAS, 146 GB, OK)
physicaldrive 1I:1:4 (port 1I:box 1:bay 4, SAS, 146 GB, OK)
physicaldrive 1I:1:5 (port 1I:box 1:bay 5, SAS, 146 GB, OK)
physicaldrive 1I:1:6 (port 1I:box 1:bay 6, SAS, 146 GB, OK)
Mirror Group 1:
physicaldrive 1I:1:7 (port 1I:box 1:bay 7, SAS, 146 GB, OK)
physicaldrive 1I:1:8 (port 1I:box 1:bay 8, SAS, 146 GB, OK)
physicaldrive 1I:1:9 (port 1I:box 1:bay 9, SAS, 146 GB, OK)
physicaldrive 1I:1:10 (port 1I:box 1:bay 10, SAS, 146 GB, OK)
physicaldrive 1I:1:11 (port 1I:box 1:bay 11, SAS, 146 GB, OK)
physicaldrive 1I:1:12 (port 1I:box 1:bay 12, SAS, 146 GB, OK)
Drive Type: Data

As marked in red, it's said configured as "Fault Tolerance: 1+0". However, it seems there are only 2 mirror group (Mirror Group0/1).

As my understanding, Raid 1+ 0 , Should there be 6 mirror group (Raid 1) and the strip togetter (Raid 0)?

e.g.

Mirror group1: phy1 - Phy2

Mirror group2: phy3 - Phy4

Mirror group3: phy5 - Phy6

Mirror group4: phy7 - Phy8

Mirror group5: phy9 - Phy10

Mirror group6: phy11 - Phy12

Is my understanding right? Or we just have wrong configuration?

Re: Smart Array setup: 1+0 or 0+1

Patrick Terlisten — Sat, 08 Jun 2013 09:19:50 GMT

According the Controller Reference Guide drives are mirrored in pairs. So my understanding of the mirror groups is, that two drives, one from each mirror group, are mirrored and all mirror paires are striped.

Re: Smart Array setup: 1+0 or 0+1

ebinhee — Thu, 13 Jun 2013 15:06:35 GMT

Thanks Patrick.

You mean, for example

Phy1 mirror with Phy7,

Phy2 mirror with Phy8,

...

right?

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Smart Array setup: 1+0 or 0+1

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Re: Smart Array setup: 1+0 or 0+1