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Old 10.11.2015, 16:04
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One for the geeks

Qqqqquestion...!
Just been to a customer with a RAID1 system running, seems one of the disks has gone TU, I havnīt had a lot to do with raid systems for a long time now but from my understanding, you simply need to remove the dud disk and put a new on in with the same specs.
Or is my memory playing tricks with me?
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Old 10.11.2015, 16:07
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Re: One for the geeks

Believe so; even with the system running.
Make sure you change the right one; had a colleague who put a major system out for days by swopping the wrong disk.
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Old 10.11.2015, 16:18
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Re: One for the geeks

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Believe so; even with the system running.
Make sure you change the right one; had a colleague who put a major system out for days by swopping the wrong disk.
*Snikker* no got the right one it was the one making funny noises... SssssT *KLICK* SssssT *KLICK* SssssT *KLICK* SssssT *KLICK* SssssT *KLICK*
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Old 10.11.2015, 16:53
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Re: One for the geeks

RAID 1 is disk mirroring. Same data written to both disks. It may or may not cope with hot disk swapping.
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Old 10.11.2015, 16:59
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Re: One for the geeks

not necessarily. the disk needs to be at least as big.

the system may not support hotswap.

the system may not rebuild the array automatically.

the system i use, you have to type esoteric commands to remove the old disk and add the new disk to the array.

if it is an appliance-like device, maybe it could work automagically just with swapping out the disk.
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Old 10.11.2015, 22:43
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Re: One for the geeks

Which raid configuration are you using? There are about 5 different types...
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Old 11.11.2015, 08:33
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Re: One for the geeks

Well itīs raid 1, apart from that...?
Thing was, to pop the drive out I had to take the computer down and remove the cables as some kind techie had used very short ones virtually strapping the disks in place, anyway I am going to get the guy who installed it in the first place, seems to me to be the easiest way.
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Old 11.11.2015, 09:24
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Re: One for the geeks

With disks configured in a RAID 1 array your technician should be able to hot swap the disk without losing data, but as I remember from 10 years ago.... it is not a simple automatic process, it needs to be commanded, to keep the mirroring intact.

The mirror configuration is broken by a management command, the disk is exchanged with the same type, and the data is copied across from disk to disk, then the mirroring is effective again.

https://en.wikipedia.org/wiki/Standard_RAID_levels
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Old 11.11.2015, 12:55
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Re: One for the geeks

As Phil says. The arrays' abilities and how it's managed very much depend on the particular system.

Probably the re-building of the array needs to be commanded. If you want to DIY you need a handbook first, usually google will be helpful.
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Old 11.11.2015, 13:06
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Re: One for the geeks

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As Phil says. The arrays' abilities and how it's managed very much depend on the particular system.

Probably the re-building of the array needs to be commanded. If you want to DIY you need a handbook first, usually google will be helpful.
No itīs a unfamiliar system so I am going to LTFANTAWS, so tomorrow the guy who installed it in the first place is a-coming to assist.
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