[Ilugc] [HW] Do the HDD cages in rack mount chassis indicate visual/audio HDD failure?
- From: rajasuperman@xxxxxxxxx (Raja Subramanian)
- Date: Wed, 12 Oct 2011 15:04:34 +0530
On Tue, Oct 11, 2011 at 5:08 PM, Arun Khan <knura9 at gmail.com> wrote:
I have no experience with rack mount chassis and the associated HDD
bays (active or passive)
To reduce the H/W cost, I am considering Linux mdadm RAID10 on a 2U
chassis. ?However, I am not sure whether there is any visual/audio HDD
failure notification from the HDD bay to the OS.
The HDD controller is the bit that informs the OS about disk failures.
HDD bays are passive equipment.
mdadm can be run in daemon mode to watch for disk errors and alert
in a variety of ways. You can use "beep" to beep the PC speaker on
errors. mdadm works with any SATA/SAS controller so you don't need
any special equipment to detect/report errors.
Unlike hardware RAID controllers, mdadm may not support true hot swap.
You may have to disable/offline the disk in mdadm before removing it from
the server chassis -- reboot is definitely not needed.
Do the HDD bays that house the hard disks have the following feature?
(a) Indicate HDD failure. LED lights up and/or audio alarm?
(b) The failed HDD can be hot swapped.
To get the above functionality what kind of bays do I need to specify?
If you are getting HP/IBM/Dell/etc, just order hot swap drive bays.
You can use ILO to blink the UID LEDs.
- Raja
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