unnecessary rebuld , why?

OneCD · Post by **OneCD** » Fri Aug 31, 2018 9:26 am

If you enable RAID bitmap before pulling the drive, then a rebuild won't be needed when it's reinserted.

MrVideo · Post by **MrVideo** » Fri Aug 31, 2018 9:29 am

It is standard practice to do a rebuild when a drive is pulled and put back in. If any data is written to the RAID while the drive is pulled, it is therefore out-of-sync. Even RAID cards for PeeCees did a rebuild if a drive was pulled. Think about how RAID works and you'll understand why. Nothing to complain about.

MrVideo · Post by **MrVideo** » Fri Aug 31, 2018 9:30 am

OneCD wrote:If you enable RAID bitmap before pulling the drive, then a rebuild won't be needed when it's reinserted.

That might work. But, as I wrote, new data to the RAID will cause the pulled drive to be out-of-sync.

OneCD · Post by **OneCD** » Fri Aug 31, 2018 9:33 am

QNAP wrote:If the RAID group has a bitmap, only changes that were made after the disk was removed need to be synchronized, greatly speeding up the process.

MrVideo · Post by **MrVideo** » Fri Aug 31, 2018 12:45 pm

OneCD wrote:
QNAP wrote:If the RAID group has a bitmap, only changes that were made after the disk was removed need to be synchronized, greatly speeding up the process.

A sync needs to be done, none-the-less. Shorter the better though.

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