SSD defrag

metaschima · 11-07-2014, 10:04 AM

Here's a filesystem benchmark for SSD and HDD, there might be newer ones since then, but probably not as complete.
http://www.phoronix.com/scan.php?pag...38_large&num=1

jefro · 11-08-2014, 08:36 PM

I think I read that a few years ago. I liked it. Good info and good read.

So much has changed in both ssd's and filesystems now that I'd almost guess a newer test would be much different.

I had hopes for NILFS2 but it's never mentioned. RH and others have put a lot into XFS.

SSD's continue to get better and last longer each day it seems.

SSD's do so much internally that almost every maker suggests it is a waste of time to defrag them.

wpeckham · 11-09-2014, 05:10 AM

Consider also, modern filesystem usage (including XFS and EXT4) is designed to minimize fragmentation and any ill effects from fragmentation to speed physical disk IO. That does not go away when you move to SSD.
While NTFS is not so advanced, it has features clearly superior to FAT/FAT32.

The more important factor when using SSD is to minimize the number of writes to extend the life of your storage. Extra writes for defragmentation that is of no or questionable benefit does not help that.

TobiSGD · 11-09-2014, 08:41 AM

Defragmenting a SSD is not only useless (simply because SSDs don't have a moving head), but it simply won't work due to the SSD's internal wearout management and on older SSDs it may even be harmful, reducing the lifetime due to the excessive writes involved in defragmentation.