Category Archives: hp raid 5 rebuild time

Hp raid 5 rebuild time

Last monday one of the disks failed on me so I replaced the disk. I added de disk as a hotspare in the array and then booted into windows. HP storage manager shows that the state of the disk is rebuilding. Yet today however, the disk is still rebuilding. How long can it take for the disk to complete it's rebuild?

The rebuild will stress the disks and could well trigger further disk errors and failures, esp for modern large disks this is especially a larger risk than it used to be. With RAID 10, there are only 2 copies of your data, and half one of those copies went out with the failed drive.

Rebuilding that drive successfully assumes there are absolutely no issues with the corresponding copy that's on the other surviving disk in the set. But if the rebuild discovers a bad block, it won't have data to rebuild with.

hp raid 5 rebuild time

Sure, it could just leave that block blank or deleted, and take your chances that it wasn't critical data. But restoring from backup will be the more reliable long-term approach. Infocon Services Inc is an IT service provider. It does takes a long time to rebuild RAID1. You have a G hard drive. Just look at your progress bar from your RAID manager. I wouldn't worry about it as long as there is progress on it.

hp raid 5 rebuild time

About the time to copy all the data from one drive to the other, as long as there's no load on the array. What kind of controller do you have?

I'd say it would have aprox gb of data. I should look at the disk-performance to get an indication of the usage, but since it contains the sbs, exchange, fileserver and an application that's accessed from the desktop I'd say it has a reasonable load. The HP Storage Manager doesn't show a progress-bar however. Only the state of the disk.

I guess I should wait a while longer for it to finish. It took me 1. I would assume it would take a lot longer if the server was up and active.

Sounds far too long for an initial build, but if the array is being actively used especially by an OS it sounds spot on. This should only take you a few hours and should complete over night.I see some other posts about this topic so sorry for duplicating those, but id like an answer myself. A drive had failed and the active spare appears to be rebuilding. The little animated "plus" icon is all that tell me this. Am i right with the 15min per GB estimate?

That means hours!

I notice the rebuild priority is at medium, is there any speed gained from setting this to high? Or turning on the Pysical Write Cache? This server is on a UPS. For one it should be completed by now right? I have phoned support and they say it all checks out OK however. The rebuild time on new gen controllers like the Pi is slightly faster, those 15 min per gig have been around for years If by write cache you mean the array accelerator then yes, it will dramatically increase performace, you should enable it, if there is no battery installed you assume the risk of possible data loss on power failure but as you mentioned, the box is running on a UPS.

Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Showing results for.


Search instead for. Did you mean:. Contact Email us Tell us what you think. Log In. New Discussion. Occasional Visitor. Thanks, Chris. All forum topics Previous Topic Next Topic.There is a fundamental shift in going on in enterprise storage. One part of the shift is the move to use solid state storage, which has very different characteristics to spinning disks. For a long time we have used RAID to protect against the failure of hard disks, storing data redundantly across a small group of disks.

A RAID6 array, thanks to its dual parity nature, can cope with two concurrent disk failures. The fundamental problem is that it takes too long to fill the large disks we are now using just to regain redundancy. All of these RAID levels will use a single disk to replace a failed disk and all will need to fill the one disk with data. The time it takes to recover from the failed disk cannot be less than the size of the disk divided by its sequential write speed. If you are using 4TB disks then your rebuild time will be at least ten hours.

These are best case rebuild times, where the limiting factor is the hard disk throughput and there is nothing else that uses the disks.

If the array is still in use it usually is then the rebuild must compete with the normal IO operations that are always placed on the array. If the array was heavily loaded before the disk failed the rebuild will be very slow. Worst of all is the heavily loaded RAID5 or RAID6 array where the parity calculation is required to rebuild the array and also to provide real data to the servers that use the array.

Since sequential write speeds of hard disks have not increased as fast as the capacity the time to recover from hard disk failure on RAID arrays has become huge. To avoid a large risk to data we need to stop using RAID and move to new data layouts that better protects us from failure of these large disks.

Are there any new disk layouts you would recommend for redundancy which do not have these limitations? I personally think RAID logic at the platter-level would alleviate a lot of these problems. This would require a re-engineering of the standard HDD to allow for removal and insertion of fresh platters. I will go even further and say drop the file system while your at it. Disks drives need to be used RAW!!!

hp raid 5 rebuild time

No file systems to corrupt, limit performance or compromise store efficiency.Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

Showing results for. Search instead for. Did you mean:. Contact Email us Tell us what you think. Log In. New Discussion. Rebuilding of RAID 5 taking too long? Occasional Visitor. We had a disk go down in are RAID so we replaced it with an identical drive. However we replaced this last monday and still have this status message in the array config util: Background parity initialization is currently queued or in progress on logical drive 2 RAID 5 in array B. When background parity initialization completes, the performance of the logical drive will improve.

Now the disks are only gb each so I expected this to be rebuilt by now. Anyone have any suggestions as to how i can rectify this? Thanks in Advance Mike. All forum topics Previous Topic Next Topic. Respected Contributor.

If possible don't boot the o. You could try changing the rebuild priority using UCU. Check with wbem if there are no errors on the harddisks. Perhaps the harddisk is trying to fix some error and this can reduce performance. Hello Wobbe, Thanks for responding, we can't take this offline because it's are exchange server which may also explain why its taking a very long time to rebuild what is the UCU you mentioned?We are experiencing longer than expected wait times to reach an agent.

Please use the resources here on our HP Support website to answer your questions and troubleshoot any issues you may be experiencing. Try our Virtual Agent and Diagnostic Tools for faster service. Check our tips and fixes! Sign out. Select registration option. Email address. Error: Javascript is disabled in this browser. This page requires Javascript. Modify your browser's settings to allow Javascript to execute.

See your browser's documentation for specific instructions. HP Customer Support. Select your model. How does HP install software and gather data?

Are you working from home? Links to additional information. Check the computer to see which one your computer has. Identifying and fixing the Hard Disk Drive error Based on the previous tables find the resolution type that matches your computer, and then follow the corresponding steps to resolve the hard disk drive issue.

Step one: Identifying the defective hard disk drive You must first find the serial number of the defective hard disk drive through the Configuration Utility. Press esc to exit the utility, and then turn off the computer.Go to Solution. Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

Showing results for. Search instead for. Did you mean:. Contact Email us Tell us what you think. Log In. New Discussion. Occasional Visitor. After the end of the rebuild the status of the first array is "queued for rebuilding" how can i start the rebuild of the array, if i can. All forum topics Previous Topic Next Topic.

Honored Contributor. By default it would start the F1 action which is to do the data recovery. Did you notice a lot of disk activity which would indicate that the disk is rebuilding? This can take a lot of time. What is the server doing right now? May not be much help but I know that a rebuild can take some 24hrs on a large drive. Mine just reported "Rebuild" as the state. I would not have thought it was necessary to do anything unless the drive perhaps needs reformatting I created the same same partitions with ntfs from the OS and left it to rebuild.

I also noted that tow of the partitions seemed to be formatted RAW and changed them to ntfs. Hope that helps! Are you sure the rebuild finished? Observer the disks and see if there is intense light activity that would indicate a rebuild process.

hp raid 5 rebuild time

Also in ACU check the status of each disk, logical disk and array. You might see something about what state they are in. Something else to consider is, firmware upgrades and ACU upgrades as well.

Z Series Workstation - Detecting and Fixing a Hard Drive Failure in the RAID Controller Utility

Take a full backup of your data right now. It is always a good idea when you do are working with the disks. They continue to run and the OS appears to be fine. We have 4 x GB drives with 1 logical disk.

The state of the logical drive is left as "Ready for rebuild". We do not always receive the alert indicating a failed drive which is weird. To date, we've had 7 servers with this issue. The first time this happened, it looked like a failed drive so I replaced the disk in question. That was a bad idea because it corrupted the logical drive and the OS was toast.

These servers get in this fragile state and we have to be very cautious troubleshooting because we CANNOT restore or rebuild the OS due to internal limitations Long story. Upgrading the FW could possibly help but due to the nature and importance of these servers, toasting another OS is too risky. We're basically letting them run as is until the department which owns the OS and application can get a new image ready.Go to Solution. Please help me in this regard Unplugged the new drive and reinserted the old one and checked ; status changed to " Rebuilding".

Of course the old inserted hdd throws amber led. With same version of the Raid conroller last year when the Raid 5 degraded, the same capacity of hdd inserted and got rebuilt without any problem. Actually the Port 1 : Box1 : Bay1 is replaced; but in the homepage it is showing as yellow mark in Port1:Box1:Bay3 which is confusing me. Upgrading in and of itself will not rebuild the array, but it's possible it addresses an issue that is preventing the RAID from rebuilding read the release notes.

Look at the logs and see if there is anything that stands out. The ADU report shows that there is a hard drive in predictive failure state and that hard drive is installed in Physical Drive 1I This explains the yellow mark against Port1:Box1:Bay3.

There are read errors on this hard drive and hence, this has been flagged to be replaced. On further reviewing the report no more read or write errors were found. Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Showing results for. Search instead for. Did you mean:. Contact Email us Tell us what you think. Log In. New Discussion. How to rebuild now? Shall I restart the server? Tags: RAID. All forum topics Previous Topic Next Topic.

Frequent Advisor. HPE Pro. Please contact HP to get this hard drive replaced. The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation. Hewlett Packard Enterprise International.

This entry was posted in hp raid 5 rebuild time. Bookmark the permalink.

Responses to Hp raid 5 rebuild time

Leave a Reply

Your email address will not be published. Required fields are marked *