Questions tagged [degraded]

Degraded refers to a fallback mode that continues to allow the usage of the storage array, but at a lower performance level.

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DEGRADED zfs pool vs FAULTED

My backup NAS (Arch-based) reports a degraded pool. It also report a degraded disk as "repairing". I'm confused by this. Presuming that faulted is worse that degraded, should I be worried? zpool ...
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RAID 5 virtual disk still shows up as degraded after repair

On a machine running Windows Server 2012 R2, I have a virtual disk consisting of 8 physical disks in a RAID-5 configuration. One drive died, so I replaced the dead drive and followed these ...
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635 views

Degraded volume on Synology NAS

Today my Synology NAS's OS (DSM) told me that I have a degraded volume. The advice on their site is to replace the failed drive. I've gone ahead and bought the same drive model and capacity, and it ...
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329 views

Fix Crashed/Degraded RAID when Data is intact but Disk Dropped from Array (btrfs/Synology)

The Volume on my Synology Expansion crashed and can't recover on its own. Drive is probably OK. It happen after cleaning the device from dust. Until that time Volume was also OK so I believe it ...
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2answers
200 views

Raid 5 Recovery Process

I just recently setup a 3 drive 4TB MDRAID 5 array for mirroring and an online backup of our server. I am preparing for a future hardware (drive) failure and wanted to mitigate a recovery failure ...
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3answers
495 views

Two drive ZFS pool, second drive overwritten with data. How do I restore/copy data back to the second drive?

Data is intact in the first drive, second drive is "UNAVAIL". Reason for overwrite is my lack of concentration while applying dd command ... Command sudo zpool replace -f hgst 4596995095197485503 /...
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1answer
343 views

HP Proliant ML350 G6 SMH reporting error with Smart Array

Our HP Proliant ML350 G6 recently turned off by itself for the first time, with the "Health LED" indicating degraded state. As soon as I pressed the power button, the LED went back to green, so after ...
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1answer
557 views

How to create degraded raid6 array using megacli

There is a server with few disks. And - a new server with PERC controller. I would like to migrate existing data into a new server to raid6 which uses 6 disks(4+2). Unfortunly - i don't have enought ...
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1answer
463 views

Ganeti disks degraded drbd cs:NetworkFailure

I have an instance (with 2disks) on Ganeti with both disks degraded (probably due to a connection problem?). This instance was working correctly for many years until this morning. On my master $ gnt-...
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1answer
195 views

zfs zpool degraded drive missing

I have a degraded zpool called storage of 4 6TB Drives in 2 mirrors. One of the drives on the second mirror is unavailable. All cables seem to to be plugged in physically. Did my device id change? ...
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1answer
31 views

How to show degraded pool under SCVMM?

Does SCVMM show degraded pool information? When a disk, which is part of a storage pool, goes down, therefore changing the pool status, where and how can I see this information under SCVMM? Server ...
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1answer
8k views

How to auto-start Degraded Software RAID1 under Debian 8.0.0 on boot?

If you remove a component HDD from an array, it drops into a "busy box" shell under "(initramfs)" saying something similar to "cannot mount root device" as the RAID1 array becomes "inactive". It is ...
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2answers
4k views

After power loss, my RAID config changed, some drives marked as foreign, but all data still there

I have a Perc 5/i in a Dell Precision 590. The controller DOES have a battery backup, and the controller reports that its status is healthy. There are five 1TB SATA drives connected to the controller. ...
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3answers
705 views

P4500 Lefthand SAN report degraded on one node when all disks are health “NORMAL”

I am experiencing a strange condition with our HP G1 lefthand SAN cluster. The cluster consists of 4 nodes across two sites, two nodes ( node 1 & 2 )in each site are RAID5 across the pair, and ...
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1answer
1k views

Mac Pro says RAID degraded but all drives showing green status

OSX 10.9 - RAID Utility says RAID array is degraded but all drives are showing green All started after error log Drive 3:5000c5004e189ddf missing - Previous drive status was inuse Now getting ...
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2k views

3ware raid controller, unit unusable, several degraded disks

I was switching the disk drives in my server, running RAID 6 on 5 disks on a 3ware 9650SE controller, for newer disks and have run into a problem. The two first disks went fine, I took out one disk ...
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1answer
354 views

what harm can writeback caching have on a degraded disk array?

At work I administer several machines using (real) hardware raid controllers (with battery backed write caches), and these have the nasty habit of falling back to writethrough behaviour when an array ...
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1answer
115 views

Artificially degrade apache2 performance to meet real world conditions

I want to degrade my apache2 development server performance (it's on a local network) to simulate real world conditions (lag, slow connections, random timeouts...). Is there any apache mod to do ...
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2answers
4k views

NAS device claims drive in a RAID is degraded but S.M.A.R.T. says it is fine

I have a Synology DS213 with two 600GB drives in RAID 1. Last night the device reported that my second drive had become degraded and that I should replace it. When I ran a extensive S.M.A.R.T. test ...
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4answers
12k views

How to resolve virtual disk degraded in Windows Server 2012

I am using the new Storage Spaces feature in Windows Server 2012. I have the following disks: FriendlyName CanPool OperationalStatus HealthStatus Usage ...
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1answer
24k views

Virtual Disk Degraded

There is a physical DC with a Raid 1 Mirror, 2 Physical Disks, 500GB each. Dell Server Administrator is installed on the DC, and is reporting both physical disks are fine, online, in a good state etc. ...
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1answer
755 views

Ubuntu server boot degraded raid

I've installed Ubuntu 12.04.1 in a new server and set up the 4 hard drives with 3 RAID 1 devices, the configuration is such that the first two drives have md0 (swap space) and md1 (/) with the third ...
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1answer
438 views

Is there a way to prevent a SW RAID 1 from degrading?

I have a number of Debian servers in a datacenter and from time to time I notice that the software RAID 1 was degraded. While the re-sync process starts automatically and I don't lose any data I find ...
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2answers
3k views

Raid1 degraded after every reboot

After setup, cat /proc/mdstat output looks like this: proxmox:~# cat /proc/mdstat Personalities : [linear] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid1 sdc2[1] sdb2[0] ...
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2answers
2k views

Debian, mdadm, Degraded Array, disk became spare after re-added

Tonight i received a message generated by mdadm on my server: This is an automatically generated mail message from mdadm A DegradedArray event had been detected on md device /dev/md3. Faithfully ...
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4answers
3k views

Ubuntu raid - replacing drive?

I've set up software RAID1 with the latest Ubuntu version - 11.04 using two 250GB harddrives which initially worked great. Tried to unplug both and computer still started with degraded raid status - ...
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5answers
7k views

Boot Debian while RAID array is degraded

Recently, I came across Ubuntu Server install. During install, it asked me whether or not to allow booting system from degraded RAID array (probably because I installed system onto RAID1 /dev/md0 ...
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1answer
2k views

LTO-4 tape shelf life estimation?

LTO tapes, Maxell in this case, are often marketed as having 30 years or more shelf life when stored under "optimal conditions" Is there a way to get a good estimation to the shelf life, given ...