Apocalypse (array)

From Livedoc - The Documentation Repository
Jump to: navigation, search

Apocalypse is a Supermicro SC847 in a multipathed JBOD configuration. It currently provides raw storage for the CSL SAN.

Technical Specifications

Array Type Hardware type::Supermicro SC847 E26-RJBOD1
Hard Disks Number of drives::35 -- See below (Population)
Data Interface 4x SFF-8088 Interface::SAS connectors (2 + 2 configuration)
Mgmt Interface None
Purchase Date December 2012

Information

Apocalypse is a multipathed SAS storage array. This means that each drive has two SAS paths via two separate backplane modules. It also means that Apocalypse requires dual-ported SAS drives in order to take advantage of the redundant paths. There are has a total of four SAS connectors on the back. The bottom two are redundant connections to the front SAS backplane and the top two are redundant connections to the rear SAS backplane.

Population

The Apocalypse array contains the following disk groups:

  • 11 2-terabyte 7.2k rpm Seagate ST2000NM0023 drives (forms the second Apocalypse vdev)
  • 11 1-terabyte 7.2k rpm Seagate ST1000NM0001 drives (forms the first Apocalypse vdev)
  • 4 6-terabyte 7.2k rpm HGST HUS726060AL4210 drives (forms the Guardian vdev)
  • 6 900-gigabyte 10k rpm Western Digital WD9001HKHG-02VUC drives (forms the Sonic vdev)
  • 3 200-gigabyte HGST HUSMM1620ASS200 solid state drives (currently unused)

Harddrive WWIDs

Below are the WWIDs for each of the HDDs installed in Apocalypse. If a drive fails, the below table can be used to identify the location of the failed drive and replace it.

Front

5000C50055DF0F1C 5000C50055DF9D44 5000C50042012E70 5000C500558C5A0C
5000C500420343AC 5000C50042012F1C 5000C500558C64B8 5000C500420A3408
5000C500420A3284 5000C500420A0920 5000C500420139FC 50000C0F0119C010
50000C0F0115E6F0 50000C0F01B6D988 0PY13ZGA 50000C0F0119C014
50000C0F01BE7CDC 50000C0F01B6D20C 0PY13LZA 0PY13M1A
5000cca24260ef7c 5000cca242623e88 5000cca2425ff9d0 5000cca242623d40

Back

Power Supplies Blank Blank Blank
Blank Blank Blank
Blank Blank Blank
Blank Blank Blank Blank
Blank Blank Blank 5000C50056032227
Blank Blank Blank Blank

Identifying Physical Disks

The storage servers have LSI Logic / Symbios Logic SAS2308 PCI-Express Fusion-MPT SAS-2 cards, so the sas2ircu utility is needed to control the drive LEDs. sas2ircu is a proprietary software by LSI, so it must be manually installed from a .deb file from here

To turn on the LED of the desired disk, we first need to determine the WWID.

Run

smartctl -a /dev/sdX | grep "Logical Unit id"

where sdX is the desired disk. This will give the WWID corresponding to that disk. Next, we need to find the physical location of that disk, so we run

sas2ircu 0 DISPLAY | less

Search for the WWID we found earlier, and the corresponding Enclosure # and Slot # for that disk should appear. To make things easier for us, we can turn on the LED for that slot, so we run

sas2ircu 0 LOCATE $enclosure:$slot ON

where $enclosure is the enclosure number and $slot is the slot number.