That might be atypical, I don't know. Well you are still skipping the one key phrase "no other bottlenecks. It's a bit like hearing that a Chevy Sonic can go mph when dropped out of an airplane, and then saying that most people say that they never get it over 90mph, and ignoring the obvious key fact that it's being dropped out of an airplane that let's it go so fast.
Even on bare metal, we normally see a lot of bottlenecks. But normally because almost no one can make their arrays go idle during a rebuild cycle. If they could, they'd not need the rebuild in the first place, typically. Distributed storage systems with per object raid FTW here. Also how the fancy erasure code array systems run this. Was the drive full? Every enterprise storage array system has done this with rebuilds for the last 20 years StorageNinja No personal experience with it.
I've only ever run RAID 1 or Just the reading I've done over the years from people reporting how long it took to rebuild larger RAID 6 arrays. I always enjoyed reading your posts on storage. I respect both you and scottalanmiller in this arena immensely. Register Login. Reply Reply as topic.
The more disks you use, the more often there will be a disk failing, and you do not want the complete business come to halt for several hours. With hot-spares, a rebuild in the background may even have completed or almost completed before you even have the chance to communicate a company-wide shutdown of all relevant activities Add a comment.
Active Oldest Votes. Improve this answer. OP said he'd have to stop other activity on the array Larger disks take longer. Slower disks take longer. Parity calculations take extra time.
HBruijn HBruijn Sign up or log in Sign up using Google. Sign up using Facebook. It should not be in the BIOS, it should be left as is until it is done. You do not reboot when a drive has failed. To continue this discussion, please ask a new question.
Get answers from your peers along with millions of IT pros who visit Spiceworks. Popular Topics in Data Storage. Which of the following retains the information it's storing when the system power is turned off? Submit ». Ghost Chili. This link may help you. John White This person is a verified professional.
Verify your account to enable IT peers to see that you are a professional. Are you using the storage heavily at the same time as it's rebuilding? Hi miT, How much data stored on hard disk??? Nikunj Rana. Then I guess it could take up to a week before it's finished. Paragraph Feb 22, at UTC. What kind of progress is being shown?
Can you limit or minimize access to the array? If there's concern about time, what about this weekend? Pure Capsaicin. Conneckter This person is a verified professional. You can change this option in the ACU, but not during a rebuild process.
Time to rebuild a RAID 1 with two 3TB drives: 9 hours Specs: My PC specs don't matter because the RAID is in an external enclosure that does all of the RAID work internally based upon dip switches on the enclosure.
Enclosure: Cineraid CR-H from early When a disk fails unexpectedly, a RAID array copies data to a spare drive while the failed one is replaced. Data is then reassembled on the new drive using RAID algorithms and parity data. What happens if a hard drive fails in RAID 5? What happens when hard disk fails in raid 5. Because of parity, information all data are available in case one of the disks fails.
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. Why is RAID 5 bad? As you know RAID 5 can tollerate a single drive failure. You don't need a second drive failure for you to lose your data. Depending on the RAID implementation, you may lose some files or the entire array.
How is RAID 5 calculated? Therefore, the usable capacity of a RAID 5 array is N-1 x S min , where N is the total number of drives in the array and S min is the capacity of the smallest drive in the array. Add the number of hard drives minus 1. How do I restore raid?
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