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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.

When a RAID array experiences the failure of one or more disks, it can enter degraded mode, a fallback mode that generally allows the continued usage of the array, but either loses the performance boosts of the RAID technique or experiences severe performance penalties due to the necessity to reconstruct the damaged data from error correction data.

31 questions
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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 yours, etc. P.S. The /proc/mdstat file currently…
cOnf_ua
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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 parameters such as relative humidity and temperature…
user38754
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How to fix ZFS pool once spare replacement done or how to correct spare replacement

I have a ZFS pool in the current state: [root@SERVER-abc ~]# zpool status -v DATAPOOL pool: DATAPOOL state: DEGRADED status: One or more devices has experienced an error resulting in data corruption. Applications may be affected. action:…
phaidros
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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 instructions for repairing the virtual disk: Replacing a…
Brionius
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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 OS restart, I opened the System Management…
Groo
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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? zpool status -v storage NAME …
NathanTheGr8
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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. My original config looked like this: VD0:…
Nick Williams
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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 errors daily saying Degraded RAID set RS1 - No…
James Greene
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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 it annoying as it slows down the servers even for…
Alex Flo
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zfs does not recognize its own physical disks

I have repeating problem with the zfs pool where zfs stops recognizing its own, properly labeled (or so it appears) physical devices. Ubuntu 20.04.2 LTS 5.11.0-44-generic #48~20.04.2-Ubuntu SMP Tue Dec 14 15:36:44 UTC 2021 x86_64 x86_64 x86_64…
agatek
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RAID1 array always degraded when rebooted after changing SATA controller

My software RAID1 arrays (/boot, /) always become degraded when restarted after adding SATA controller. It's CentOS 7. Here is what happening and what had been done: I made 4-disks RAID1 arrays with following setup: SATA Controller A (-HDD1 /…
NON
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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 has arrived. However, I'm struggling to know which…
shennan
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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 Manager shows a warning exclamation mark stating the…
slybloty
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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 and inserted a new one, let the array rebuild and…
user155563
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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 something similar?
Peter
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