Replacing hard disks in the S500 Security Analytics sensor
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Replacing hard disks in the S500 Security Analytics sensor

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Article ID: 262525

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Updated On:

Products

Security Analytics

Issue/Introduction

A disk may fail in the Security Analytics S500 appliance.  The drives may be hot swapped.  It is important to know which physical slot the drives belong to. All hard disks are hot swappable. This document is for the S500 internal drives only.

 

Environment

SA-S500-10-CM
SA-S500-20-FA
SA-S500-30-FA
SA-S500-40-FA

Any Dell systems, for the drives in the server itself.

Resolution

The failed disk may be found using the lsi-show utility as root.  Then determine which slot has the failed disk. The enclosure number and slot number are under the E:S columns for each drive.  The first disk in this case is listed as:

Id   E:S      Status                         FC       Size           Inquiry
22   25:8     Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
20   25:9     Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER

The first disk is listed as Slot 8. This drive is on the far left when looking at the front of the appliance.  The second is for Slot 9.  The last drive on the far right is Slot 31. 

The listing from the lsi-show utility on an SA-S500 mayl show something like:

lsi-show

Controller Information
Id   Serial No        Firmware             Encl LD   PD   Product Name
a0   SERIAL_NUMBER    3.460.05-4565        1    3    19   LSI MegaRAID SAS 9271-8i

Enclosure Information
Id   Drives
25   22  20  24  23  21  27  31  38  28  30  33  39  34  32  29  36  35  37  26 

Logical Drive Information
Id   Size         Status       Stripe   Raid Level   Cache
0    7.275 TB     Optimal      256 KB   Primary-5    WriteBack, ReadAhead, Direct, Write Cache OK if Bad BBU
  by id: 22,20,24,23,21
  by es: 25:8,25:9,25:10,25:11,25:12
1    5.456 TB     Optimal      256 KB   Primary-5    WriteBack, ReadAhead, Direct, No Write Cache if Bad BBU
  by id: 34,32,29,36
  by es: 25:20,25:21,25:22,25:23
2    1.818 TB     Optimal      256 KB   Primary-5    WriteBack, ReadAdaptive, Direct, Write Cache OK if Bad BBU
  by id: 35,37,26
  by es: 25:25,25:30,25:31

Physical Drive Information
Id   E:S      Status                         FC       Size           Inquiry
22   25:8     Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
20   25:9     Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
24   25:10    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
23   25:11    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
21   25:12    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
27   25:13    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
31   25:14    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
38   25:15    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
28   25:16    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
30   25:17    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
33   25:18    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
39   25:19    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
34   25:20    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
32   25:21    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
29   25:22    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
36   25:23    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
35   25:25    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
37   25:30    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER
26   25:31    Online, Spun Up                None     1.819 TB       SEAGATE ST2000NX0343    SERIAL_NUMBER

There is a utility to turn on the LED lights for an individual disk that helps to identify the drive physically. The megacli command is used to display the status of the drives and also manage them.  To light the LED on the drive, run the the megacli command as root: megacli -pdlocate -start|-stop -physdrv[E:S] -a0

For the drive in the first slot, Slot 8, you would run as root megacli -pdlocate -start -physdrv[25:8] -a0.  You can light up two or three drives to more easily identify the drive.  To stop the LED from blinking run megacli -pdlocate -stop -physdrv[25:8] -a0.

Once the correct drive is located and the replacement drive has arrived, remove the failed drive using the drive lever and place the new drive in the slot and make sure it is seated all the way and that the drive lever locks in place.  The RAID controller will automatically recognize the newly inserted drive and begin the rebuild process, which can take many hours to complete.  

To view the rebuild status of the newly inserted drive, use the E:S values of the new drive and run this command as root: 

megacli -PDRbld -ShowProg -PhysDrv[E:S] -a0

If the drive in Slot 9 was the one that was replaced, the command would be megacli -PDRbld -ShowProg -PhysDrv[25:9] -a0

Contact support if you have further questions.  When requesting an RMA, always include a shipping address with a contact name and phone number.

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