RAID Rebuild Times With SSDs

This is the kind of stuff I would love to investigate, if I had the resources. I don't, but we can turn to the folks at The Register in this case.

RAID is great technology, but when the rubber hits the road and you need to replace a failed drive, rebuild times can be pretty horrible with large disks. In a production setting that can be a problem.

As you might expect/hope, SSD drives do allow faster rebuilds of RAID arrays. How much faster? Check out the full story.
There are two questions here: SSD vs HDD RAID rebuild times and RAID-vs-erasure code rebuild times. We’ll look at HDD vs SSD rebuild times here.
In a RAID disk rebuild, a portion of that time is disk access latency. What percentage of, say, a near 10 hour RAID rebuild of a failed 4TB disk drive is taken up disk latency? We can then ask: what percentage of a failed 4TB SSD data rebuild will be taken up by SSD access time? Will SAS vs SATA vs NVMe SSD access influence the overall SSD rebuild time?
TheRegister

Comments

Popular posts from this blog

VPN Use Is Up, Up, Up

Microsoft's Mild Mea Culpa Over Windows 10 Obscure Upgrade "Choice"

Q4OS Linux On An Old Windows Laptop