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Rebuild Raid 1 Without Losing Data


On a home server, the above settings make sense - but better check your users before you do it on a productive enterprise system.

From: Kevin Reply Hi,Thank you for Load More View All HPE boosts MSA and StoreVirtual with sub-$10,000 flash storage options NetApp Solidfire adds high-end SF19210 all-flash array Enterprise storage meets HPC with DDN SFA14KXi all flash array All rights reserved. Do i need backup of the backup of the backup to recover from a crash?Cant get more confused and frustrated than i am know... http://olivettipc.com/raid-1/how-to-break-raid-1-mirror-without-losing-data.html

Your PCI version I believe is the same chipset / driver, but may have different software. Appreciate your help

From: Jon Jaroker Reply Thanks for the clear guide.  You should add a caution note to first copy the master boot record and install grub on the RAID 10: RAID 10's mirrored stripe sets rebuild at a pace similar to that of RAID 1. server1:~#mdadm --manage /dev/md3 --fail /dev/sdd1 mdadm: set /dev/sdd1 faulty in /dev/md3 server1:~#mdadm --manage /dev/md3 --remove /dev/sdd1 mdadm: hot removed /dev/sdd1 server1:~#mdadm --manage /dev/md3 --add /dev/sdd1 mdadm: re-added /dev/sdd1 server1:~#watchcat/proc/mdstat Every 2.0s:

Rebuild Raid 1 Without Losing Data

Any help will be greatly appreciated. Reply Link marco September 24, 2008, 2:57 pm> Nikhil "harddrive of 250gb" "harddisk new 500gb" Mustn't it be a pair of harddisks with the same size? My system was originally setup with two identical Segate 1TB drives and partitioned as follow: /dev/md0 /boot Raid-1/dev/md2/ / Raid-1/dev/md3/

I was welcomed by my login screen. Like disk1 is having a,b and c data and disk 2 is having d, e and f data. When and if you begin in-house troubleshooting on failed RAID equipment, be meticulous and get assistance to document each and every remedial step taken. Raid 5 Disk Failure Recovery If your Bios (which probably doesn't know about raid disk pairs) is pointing to the disk slot with the blank disk, you are not going to boot!

Flag Permalink This was helpful (0) Back to Storage forum 9 total posts Popular Forums icon Computer Help 51,912 discussions icon Computer Newbies 10,498 discussions icon Laptops 20,411 discussions icon Security Raid 1 Hard Drive Replacement Linux is an amazing OS, but when you start to run mission critical services on there and don't employ or train people to support it properly, it is pages like this I know the owner, if you post exactly what controller it is, i can call myself if you want.  0 Anaheim OP Tommy2346 Oct 29, 2009 at 8:47 I have installed a new identical drive but the raid has not rebuilt the 4th drive.The raid utility does not show any conflicts and there is no setting to rebuild raid

i replaced the one that says missing with the drive thats called new member and the rebuild option is still not available Nov 30, 2012 2:25 PM Helpful (0) Reply options Rebuild Raid 1 After Drive Failure Networking hardware evolution is necessary in a software-defined world Even in this software-defined world, expect a networking hardware evolution. I have had great success and reliablility up to this point. Your data center UPS needs are dependent on a variety of factors.

Raid 1 Hard Drive Replacement

Some things that may seem like an issue may or may not be, even. additional hints Join the Community! Rebuild Raid 1 Without Losing Data Thanks for the guide.

From: solo Reply Excellent guide! How To Rebuild Raid 1 So while it's true that it could be an issue, a degraded array does not necessarily equate to a dead disk as such.

Unfortunately with SATA it's not always easy to determine which drive is the faulty one. useful reference It will go to 100% activity -- watch for the pretty lights... :)

From: Gary Dale Reply The question refers, I believe, to the physical drive to be replaced. SearchStorage.co.UK: How can I cut RAID rebuild times? If my motherboard supports hotswapping, would the reboot still be necessary?

From: Benjamin Reply If your controller supports hot-swapping, then the reboot is NOT required.You'll run rescan-scsi-bus.sh after replacing the Raid 1 Hard Drive Failure

It just seems to me that while you guys have had controllers go there are other systems in play as well that could be impacting it. b - the boot drive is NOT RAIDed.  If I care much about rebuilding the / partition, then I will make an image (dd image) of the system for ease of We have to assume the OP being a responsible admin has data backups as he / she assumed that risk in the build in the first place.#2. http://olivettipc.com/raid-1/raid-1-0-calculator.html If you use nixCraft, who likes it, helps me with donations: Become a Supporter → Make a contribution via Paypal/Bitcoin → Don't Miss Any Linux and Unix Tips Get nixCraft in

move drive with issue to different slot and move the other one to the problem drive's slot? Raid 5 2 Disk Failure Click All Programs. Download for later: Listen to the podcast with Steve Pinder • Internet Explorer: Right Click > Save Target As • Firefox: Right Click > Save Link As SearchStorage.co.UK: When do RAID

This is called Dell OpenManage Server Administrator.

view as pdf | print Share this page: Tweet Follow Suggested articles 78 Comment(s) Add comment Name * Email * Comments From: Reply Thanks for the great article. Function as a service, or serverless computing: Cloud's next big act? There are two main instances where a hard drive will be replaced in a RAID array: Pre-failure replacement Post-failure replacement Pre-failure replacement is when an array senses that the hard drive Raid 5 Hard Drive Failure You cannot swap drives around in the array.Lastly, if you are going to upgrade an array, my suggestion is to backup your entire system to an external drive by using Acronis

SearchStorage.co.UK: What are the relative rebuild times for the different RAID types? Be familiar with any RAID subsystem manufacturer's documentation and technical descriptions. FYI 0 Thai Pepper OP JN Patrick Oct 28, 2009 at 8:57 UTC Also you can try to call someone here http://www.com-cycle.com/index.html

They are a local Electronics recycling get redirected here This seems to be the best case scenario for a drive failure in a mirrored RAID array (i.e.

Flag Permalink This was helpful (0) Collapse - Toshiba Drives by JibT / February 7, 2016 1:19 PM PST In reply to: MS RAID did seem to meet some of your If extra (spare) disks are available, then reconstruction will begin immediately after the device failure.However if two hard disks fail at same time, all data are LOST.In short RAID 5 can The priority given on the array to rebuild activities. It's always on the same slot.  The event logs were basically useless.

i tried to reboot unfortunately it won't. Replacing the "new" broken drive was the trick. It's very very well written and helped me alot. DON'Ts ~~~~~~~~~~~~~~~~~~ Do not think of a RAID-5 as a data backup solution (it's really only a scheme to increase data availability).

Machine learning in security is continuing to advance, and many companies now claim to have introduced artificial intelligence ... Comparing /proc/mdstat from before and after will confirm the drive that failed. Exactly what I needed to add to my toolbox. Click Rebuild to another disk.

We'll send you an email containing your password. I don't car about my os, I just need some small data file that was not backed up. 2 computer guys looked at it and said I had little chance of SATA 0 <--> /dev/sda, SATA 1 <--> /dev/sdb, etc.). Reply Link Muthu November 11, 2010, 9:07 ami want some clarification from raid 5 if I have 8 hard drives that connected by raid 5 technology two of them had break

Once we installed the new drive everything rebuilt, but the Array Disks still showed in a degraded state. It just requires having enough SATA connections.

From: the_rusted_one Reply Actually, it is much easier than all that.  Here's what you do (PREFERABLY BEFORE the failure event, but still this Text Quote Post |Replace Attachment Add link Text to display: Where should this link go? Then I tried something: in WebBIOS I put the FAILED Physical Drives back ONLINE, then rebooted.

Also would i need to know which order of drives are inside the Lacie box, and likewise order them in the same logical order in the desktop controller, or does that