Hardware Card for Thors

Short description about the hardware.

Specifications

What's inside the hardware, probably depending on what we're talking about.

Interesting information like how to handle it, anything interesting which is not trivial.

When you need to change a disk, you need to identify:

The device name. You probably already have it.
The raid it belongs to: cat /proc/mdstat
The physical location of the disk hd. Print it (beware it may be different depending on the machine)

Check that the disk is no longer part of the raid (in /proc/mdstat), and go and replace the disk (can be done while the machine is up). Afterwards:

Check with dmesg that the new disk is detected, and the firmware revision is the same as the other disks
Partition the new disk, with a replica from a working disk. Eg: sfdisk -d /dev/sda| sfdisk --force /dev/sdah
Add the disk to the raid it belonged to: mdadm --add /dev/md0 /dev/sdah1

Check the disk is visible (as spare) on the raid. Then:

Instructions on how to set up a new machines that arrives, with things like:

Information about benchmarks performed in the machine.

Example:

Machine	Size	K/sec	%CP	K/sec	%CP	K/sec	%CP	K/sec	%CP	K/sec	%CP	/sec	%CP
Version 1.96		Sequential Output						Sequential Input				Random
Concurrency	1	Per Chr		Block		Rewrite		Per Chr		Block		Seeks
xfs	100000M	1673	98	258522	32	164738	23	3401	99	455836	29	518.8	13
Latency		4954us		314ms		231ms		7143us		177ms		74101us
ext4	100000M	927	98	256154	46	159501	19	3983	99	530509	35	400.6	34
Latency		9114us		206ms		599ms		2388us		150ms		627ms

Instructions about monitoring the hardware

External links to manuals

Information about issues found with this hardware, and how to deal with them