How to choose a replacement disk in a raid?

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Vadim Choporov2016-12-08 16:56:51

Iron

Vadim Choporov, 2016-12-08 16:56:51

Good afternoon.
Flew 1 disc in the raid. There was 1 in the reserve - he replaced it. But, since the disks are old, such a model can no longer be found. Used Seagate Constellation ES model no: ST31000424SS (SAS). I know that you need to take a disk of the same or larger size, cut off the extra space, and add to the array as much as you need. What else should you pay attention to when choosing a disk for a reserve in a Raid array?

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6 answer(s)

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Ilya Evseev, 2016-12-10
@IlyaEvseev

What else should you pay attention to when choosing a disk for a reserve in a Raid array?

For brand and model.
Make must be Hitachi, model must be UltraStar.

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Dmitry, 2016-12-08
@plin2s

If there is no equivalent replacement, then it is very desirable to choose the most similar in characteristics. Look at the number of platters/heads, cache size, spindle speed, physical sector size (512N, 512E, 4KN).
It is also worth noting that different manufacturers may have different available amount of space (discrepancy between the number of blocks / sectors).
It's true that I haven't practiced in a long time. Subscribe to answers.

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Diman89, 2016-12-08
@Diman89

In addition to the above, you can get confused with firmware chips, such as TLER

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Vladimir Kuzin, 2016-12-09
@Bobson8

When choosing disks, I advise you to pay attention to the segment for which the disk is released - server, for data centers, or for desktops. Accordingly, it is better to take disks for data centers under the raid. I strongly do not recommend taking a Seagate Constellation (and Seagate in general) - over the past 5 years, I have noticed a terrifying trend in my experience - any drive from Seagate (whether it be an enterprise or desktop version) flies steadily for 2 years. After the second rebuild of the 6-disk raid (that is, 12 disks completely failed in less than a year and a half), Seagate spit on everything and switched to WD. They have some sort of stability. Now I use WD RE Datacenter Storage. While satisfied.

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Ivan Trofimov, 2016-12-15
@cbone

1. Support for the new disk by the RAID controller.
2. The volume of the new disk is greater than and equal to the volume of the old one.
3. The speed of all disks must be the same.