How long raid 1

However, keep in mind that using an at-home recovery software can make cause more damage than good in some instances. To recover RAID 1 data it is recommended to rely on expert data recovery help the first time since this is your best chance at recovering lost files. The time needed to rebuild an array depends on the capacity of the data saved on the drive.

Another way to determine this is the capacity of the array combined. Smaller disk capacities might rebuild in a matter of hours. Before rebuilding make sure to create a backup of all the significant files. The data may be deleted in this process. However, the performance could slow down during the process of rebuilding the data. Drives that have large amounts of data stored on them need more time to recover. In the case of multiple drive failures, the data recovery process would be even longer.

Important data could be lost in case the other drives fail when the affected disk is replaced. Instances like these call for data recovery. This will lead to data corruption throughout the array.

There is no safety net in terms of accidental deletion. Until and unless the RAID is rebuilt it is advisable to not create, delete, move or modify any files or applications. Such modifications are made on both drives at the same time. This will further lead to copying the corrupted data throughout the array.

If the disks have operated up to the time of hard drive failure, then two drives get affected. For example, if there are 4 disks of two terabytes each in the array, the available RAID 1 data storage will only be 4TB.

Such occurrences could lead to irreparable data loss. In a RAID arrays failure, the drive that has failed last has the recent copy of the information. The number of failed raid rebuild trials can dwindle the chances of a successful RAID 1 data recovery. The RAID array is only as big as the smallest drive in the block. It is recommended to not create a RAID on old drives. This could lead to the deletion of the old files and cause a faulty RAID arrays.

It is not suggested to rebuild the data if you cannot access the array. A RAID 1 is used for storage capacity that combines multiple or at least two disks for data redundancy in a cost-effective way. This further helps you experience the reliability and speed of an expensive hard drive. The RAID can mirror applications along with files. A RAID 1 is used in operations like online transactions, accounting systems, financial information, and emails. You can try updating the firmware on the PERC and drives to see if you can find a combination that works well.

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Showing results for. Search instead for. Did you mean:. All forum topics Previous Topic Next Topic. Reply 1. Post Reply. Asked 10 years, 3 months ago. Active 5 months ago. Viewed 14k times. Is this normal for an online reconfiguration? Is this indicative of the amount of time it would take to rebuild the array should a drive fail? Is it possible to force an offline reconfiguration of the array?

Assuming that would speed things up. Edit: Thanks for the responses. I'll test this out by unplugging a drive and seeing how long it takes to rebuild. Improve this question. Add a comment. Active Oldest Votes. Improve this answer. There's no load on the drives, and aside from some test data 5GB or so. Normal is relative. It should take some hours to reconfigure online.

The exact time should be the size of the disc divided by the throughput of a single drive plus some small overhead. With active usage the small overhead would transform to a bigger overhead. But 24 hours with no progress is too long. Yes you can estimate that this is the exact time needed in case of a recovery. It should be possible. From within the controller's configuration setup during boot up. Chopper3 Chopper3 99k 9 9 gold badges silver badges bronze badges.

Thanks - There's a small amount of data a few GB, test data for doing some basic IO throughput tests. I was trying to see what it would be like to do online capacity expansion at a later date.

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