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Adaptec - Replace Failed Disk
Replacing failed disks is part of managing storage arrays and a mistake could lead to catastrophic data loss. The steps below will guide us on how to replace a failed disk in an Adaptec RAID card.
First, let's get the controller ID.
arcconf getversionControllers found: 1
Controller #1
==============
Firmware : 5.3-0 (19204)
Staged Firmware : 0.0-0 (19204)
BIOS : 5.3-0 (19204)
Driver : 1.2-1 (50983)
Boot Flash : 0.0-0 (19204) We can now check the status of our RAID Arrays.
arcconf getconfigUsage: GETCONFIG <Controller#> [AD | LD [LD#] | PD | MC | CN | [AL]] [nologs]
===================================================================================
Prints controller configuration information.
Option AD : Adapter information only
LD : Logical device information only
LD# : Optionally display information about the specified logical device
PD : Physical device information only
MC : Maxcache 3.0 information only
CN : Connector information for smartHBA only
AL : All information (optional)arcconf getconfig 1 LDControllers found: 1
----------------------------------------------------------------------
Logical device information
----------------------------------------------------------------------
Logical device number 0
Logical device name : LogicalDrv 0
Block Size of member drives : 512 Bytes
RAID level : 6 Reed-Solomon
Unique Identifier : EF9AD836
Status of logical device : Suboptimal, Fault Tolerant
Size : 5720054 MB
Parity space : 1906688 MB
Stripe-unit size : 256 KB
Read-cache setting : Enabled
Read-cache status : On
Write-cache setting : Enabled
Write-cache status : On
MaxCache read cache setting : Enabled
MaxCache read cache status : Off
Partitioned : Yes
Protected by Hot-Spare : No
Bootable : Yes
Failed stripes : No
Power settings : Disabled
--------------------------------------------------------
Logical device segment information
--------------------------------------------------------
Segment 0 : Present (Controller:1,Connector:0,Device:0) WD-WCAW34523030
Segment 1 : Present (Controller:1,Connector:0,Device:1) 9XG4HR6T
Segment 2 : Present (Controller:1,Connector:0,Device:2) WD-WMATV6234407
Segment 3 : Present (Controller:1,Connector:0,Device:3) WD-WMATV6327356
Segment 4 : Present (Controller:1,Connector:1,Device:0) WD-WCAW34522334
Segment 5 : Present (Controller:1,Connector:1,Device:1) WD-WMATV6292750
Segment 6 : Present (Controller:1,Connector:1,Device:2) 9XG4HNW3
Segment 7 : Missing
Command completed successfully.
We can see in the results that HDD7 (segment 7) is missing and it needs to be replaced. I will locate the failed drive and physically replace it.
After the replacement we need to rescan for new drives.
arcconf rescan 1Controllers found: 1
Rescan started in the background and can take upto 10 mins to complete.
Command completed successfully.We can confirm if the new disk has been recognised.
arcconf getconfig 1 PD | grep -i "Device #\|Serial Number"Device #0
Serial number : WD-WCAW34523030
Device #1
Serial number : 9XG4HR6T
Device #2
Serial number : WD-WMATV6234407
Device #3
Serial number : WD-WMATV6327356
Device #4
Serial number : WD-WCAW34522334
Device #5
Serial number : WD-WMATV6292750
Device #6
Serial number : 9XG4HNW3
Device #7
Serial number : WD-WMATV6104245
The new disk is listed under Device #7.
Rebuild the Array
We need to initialize the replaced disk.
Usage: TASK START <Controller#> DEVICE <Channel# ID#> <task> [<password>][noprompt] [nologs]
Channel# ID# : The Channel and ID of the physical device on which task is to be
performed. Optionally ALL indicates all ready drives for initialize
task only (ex. ARCCONF TASK START 1 DEVICE ALL INITIALIZE).
Physical Tasks : verify_fix
verify
clear
initialize
secureeraseWe need the channel ID of the new inserted disk to initialize it.
arcconf getconfig 1 PD | grep -i "Device #\|Serial Number\|Channel"...
Device #7
Reported Channel,Device(T:L) : 0,7(7:0)
Serial number : WD-WMATV6104245arcconf TASK START 1 DEVICE 0 7 initializeControllers found: 1
Initializing Channel 0, Device 7 will erase its metadata, the section
where all the logical device definition data is stored
Are you sure you want to continue?
Press y, then ENTER to continue or press ENTER to abort: y
Initializing Channel 0, Device 7.
Command completed successfully.After the drive has been initialize if the rebuild does not start automatically we need to set the drive as hot spare to our suboptimal array.
arcconf SETSTATE 1 DEVICE 0 7 HSP LOGICALDRIVE 0And the rebuild should start automatically.
arcconf getstatus 1Controllers found: 1
Logical device Task:
Logical device : 0
Task ID : 106
Current operation : Rebuild
Status : In Progress
Priority : High
Percentage complete : 0
Command completed successfully.After the rebuild the array should report as optimal.
tiago@home-svr2:~$ arcconf getconfig 1 LD
Controllers found: 1
----------------------------------------------------------------------
Logical device information
----------------------------------------------------------------------
Logical device number 0
Logical device name : LogicalDrv 0
Block Size of member drives : 512 Bytes
RAID level : 6 Reed-Solomon
Unique Identifier : EF9AD836
Status of logical device : Optimal
Size : 5720054 MB
Parity space : 1906688 MB
Stripe-unit size : 256 KB
Read-cache setting : Enabled
Read-cache status : On
Write-cache setting : Enabled
Write-cache status : On
MaxCache read cache setting : Enabled
MaxCache read cache status : Off
Partitioned : Yes
Protected by Hot-Spare : No
Bootable : Yes
Failed stripes : No
Power settings : Disabled
--------------------------------------------------------
Logical device segment information
--------------------------------------------------------
Segment 0 : Present (Controller:1,Connector:0,Device:0) WD-WCAW34523030
Segment 1 : Present (Controller:1,Connector:0,Device:1) 9XG4HR6T
Segment 2 : Present (Controller:1,Connector:0,Device:2) WD-WMATV6234407
Segment 3 : Present (Controller:1,Connector:0,Device:3) WD-WMATV6327356
Segment 4 : Present (Controller:1,Connector:1,Device:0) WD-WCAW34522334
Segment 5 : Present (Controller:1,Connector:1,Device:1) WD-WMATV6292750
Segment 6 : Present (Controller:1,Connector:1,Device:2) 9XG4HNW3
Segment 7 : Present (Controller:1,Connector:1,Device:3) WD-WMATV6104245
Command completed successfully.Resources
What is the cause and resolution for array state degraded and array members state optimal?
After drive failure and replacement auto-rebuild does not start, why?
Adaptec hardware RAID controller - Hetzner Docs
