RAID, an acronym originally for Redundant Array of Inexpensive Disks (today usually interpreted as referred to as Redundant Array of Independent Disks), is a technology that provides increased storage performance and reliability through redundancy by spreading data across multiple disks using various algorithms (RAID-levels). RAID can be implemented in hardware storage controllers, or in software, usually as operating system/kernel features.
Questions tagged [raid]
3585 questions
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MegaRAID SAS 2108 - Can I use different drives for the same array
I know you can in general use different drive manufactures and size in general but does anyone know if the MegaRAID SAS 2108 card will let me do RAID 5 with multiple drives that are not the same in exact size/make/model?
As in, will it allow via the…
Yif Swery
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HP server with failed disk in hardware RAID 5, how to replace (have same-spec disk)?
My system Admin suddenly took an emergency leave and I am not so good in system administration. Seeking your help.
I have a HP server running VMware. The server contain Hardware Raid 5 with three SAS HDD. One of the HDD showing warning sign and I…
Genuity Systems
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LSI MegaRAID reports bad drive but SMART status is good
I am setting up a NAS with 8 known-good 8TB WD Red drives from a previous NAS. When I configure RAID 6 across these drives my (untested) LSI MegaRAID 9265-8I starts beeping and reports that that drive is bad. However, when I run WD's LifeGuard…
Nathan Owen
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Expand existing data partition of raid volume to max volume size w/o data loss
I'm using an Areca ARC-1220 raid controller with 8x4TB HDDs (RAID-6). Initially, I had 2 volumes (à 12 TB, all data). My plan was to merge both volumes into one single volume. I deleted volume 2 (backup done) and expanded volume 1 to 24 TB (8x4-8…
geohei
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Dell H200 RAID controller + SATA drives
I've bought a H200 hardware RAID controller to go into a Poweredge R210.
I've got two 2TB SATA drives to setup as a RAID1 array.
The question I have is:
Do I need to connect the SATA drives to the H200 via the on-board SAS ports, or can I continue…
solstice
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Removing failed Raid0 volume from CentOSv6 boot sequence
I need help. To date the majority of my Linux 'software RAID' use has been done via the Graphical Installer. Now, one of the drives comprising my RAID-0 volume has failed and at boot, the system bails out to a command line so I can fix the problem.…
ChiefEngr
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Information needed on availability of RAID controllers that have hardware encryption capability
I am somewhat familiar with the RAID controller card offerings in Dell servers, such as PERC H730P in their PowerEdge servers. And also some of the LSI 9xxx series RAID controller cards, that allows RAID configuration of 8,16, or 24 SAS/SATA…
ron
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What are the pitfalls of having an "unbalanced" RAID1?
Context: I have a server with two 3TB NAS drives in a RAID1 (Linux dmraid) and I am looking to double storage capacity, but I only have one free drive bay. I could purchase two 6TB drives, but I had the thought that I could possibly get away with…
cdhowie
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HP DL360e G8 with P410I
Can I use a P410i RAID Controller in the HP DL360 "e" version G8 server? I currently have several G7 boxes with 410i's in them, working fine. I see listed in the QuickSpecs for the DL360"e" versions that the P420 is listed as the "performance" model…
kellyredbook
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MegaCLI RAID1 - Can't Replace Missing Disk
I have a RAID1 where I've replaced a disk with errors, however it will not automatically or allow me to manually replace the "missing" disk with the new one.
Here are the physical disks per my controller:
# MegaCli64 -PDList -aALL | grep -E…
azurepancake
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HP RAID-0 expand on DL180G6
There's HP DL180G6 Server with HP Smart Array P410 controller. Server running MySQL on Debian Linux with ext4 fs. HPACUCLI utilities (ACU CLI Version: 9.40.12.0) are installed.
There's 4 HDD Seagate 600GB in RAID 10 array. I want add 2 more HDDs to…
Someone
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How to tell whats making this server slow
Hello I have an HP server configured for RAID 1+0 using 2 SATA disks. I'm pretty new to handling servers also.
The server has had the same OS(Windows Server 2003) on it for a while so I'm not sure of what all it has been through.
It has a dual…
Earlz
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Saving a 3ware RAID configuration for later use?
I have a 3ware-based (using tw_cli) 24-bay array filled with 2 TB hard drives, used for backup. The plan is to upgrade them to substantially larger drives, but I would like to remove the 2 TB drives and label them so that if the upgrade fails for…
John Cholewa
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Accidental SAS cable removal
We accidentally removed a SAS cable from an active AVAGO MegaRAID controller during a troubleshooting session. After we reconnected the SAS cable, all disks in the RAID6 disk array are reported as Frn-Bad and the virtual drive is gone.
We could now…
Zeta
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How to pre-emptively repair/replace drive in linux md array without going degraded first?
I have (had, it's already been swapped out, asking this for future use) a drive that is indicating pending failure with internal SMART tests and bad block remaps.
It is straightforward to mdadm --fail the soon to be bad drive and rebuild to a hot…
Nathan Neulinger
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