Author Topic: LS220 RAID0 Drive #2 Failed - Now what???  (Read 211 times)

DTDC

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LS220 RAID0 Drive #2 Failed - Now what???
« on: July 16, 2019, 06:01:10 pm »
On my LS220, I received a warning that drive 2 failed in my RAID1 array

Ordered a new drive to replace it.

The instructions are unclear at this point.  The whole purpose of a RAID0 is to retain 100% of the data in the event one of the drives fails.

Buffalo says:
Quote
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4 Remove the drive from the cartridge.
5 Install a new Buffalo OP-HD/LS series drive in the cartridge.
6 Replace the four screws.
7 Insert the new drive in the empty slot.
8 Close the front panel.
9 Connect all cables, then turn on the LinkStation.
10
For RAID 0
Navigate to Drives - RAID in Advanced Settings. Select the array with the error, then click Delete RAID Array.
Navigate to Drives - Drives. Choose the new drive (the unformatted one) and format the drive. After formatting the
drive, change the RAID mode.

Will this delete all of the data on my remaining GOOD drive? I'm not about to risk losing everything I have on there. The instructions leave a bit to be desired.

« Last Edit: July 16, 2019, 06:55:51 pm by DTDC »

1000001101000

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Re: LS220 RAID0 Drive #2 Failed - Now what???
« Reply #1 on: July 16, 2019, 09:16:47 pm »
https://en.m.wikipedia.org/wiki/Standard_RAID_levels
Raid0 = striping
Raid1 = mirroring

If one of your drives in your raid0 drives died the whole array is lost. Thats probably why the directions make no mention of bringing the array back online.


Coys55

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Re: LS220 RAID0 Drive #2 Failed - Now what???
« Reply #2 on: July 18, 2019, 08:30:19 am »
Unless you have a backup (which you should still have even with RAID1 [disk mirroring]) I'm afraid your data has all gone. For clarification, from Wikipedia's Standard Raid Levels page (my bolding):

RAID 0 (also known as a stripe set or striped volume) splits ("stripes") data evenly across two or more disks, without parity information, redundancy, or fault tolerance. Since RAID 0 provides no fault tolerance or redundancy, the failure of one drive will cause the entire array to fail; as a result of having data striped across all disks, the failure will result in total data loss. This configuration is typically implemented having speed as the intended goal. RAID 0 is normally used to increase performance, although it can also be used as a way to create a large logical volume out of two or more physical disks.

So I'm afraid that your are wrong with your claim that "The whole purpose of a RAID0 is to retain 100% of the data in the event one of the drives fails".

Full Wikipedia article here: https://en.wikipedia.org/wiki/Standard_RAID_levels
« Last Edit: July 18, 2019, 10:41:04 am by Coys55 »

Coys55

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Re: LS220 RAID0 Drive #2 Failed - Now what???
« Reply #3 on: July 18, 2019, 10:40:15 am »
I see the OP has now changed RAID0 to RAID1, which renders our comments/advice meaningless.
« Last Edit: July 18, 2019, 10:43:38 am by Coys55 »

1000001101000

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Re: LS220 RAID0 Drive #2 Failed - Now what???
« Reply #4 on: July 18, 2019, 10:51:13 am »
In 1 of 3 places anyway. I assume that answers the question they had with the RAID0 directions, they really wanted the RAID1 directions.

I'm glad to hear that, I hate hearing about people losing data.