One drive always backs up slowly

[daystrom]

Case # 07725611

[Moderator: Corrected case number]

My pc has 4 internal storage device, all are 2.5" ssd, except for the boot drive which is an m.2. The e drive always backs up at a much slower pace than the other drives. I have switched the ssd out multiple times, using different brands of ssds, all 2 tb. The e drive contains mostly vm files which are larger than most files, but those should back up faster not slower. The drive is fairly full, 8% free. None of the files on the e drive are in use when I back up. The backup target can be an internal hdd or an external usb connected hdd.

The other three drives report file transfer speeds between 125 mb/s 240 mb/s, the e drive reports 19 mb/s

This issue has persisted for years, it's a real pain. A full backup to external drive takes at least 24 hours because of this one particular slow drive.

Veeam Agent 6.3.1

Why does that drive back up so slowly, regardless of which ssd it is located on?

[david.domask]

HI daystrom,

Thank you for sharing the case number; I see the case is opened with Community Edition; please note that Community Edition is supported on a Best-Effort basis depending on Veeam Support's availability -- if you have a license with an active support contract, I recommend opening a case under that license.

Probably a review of the logs will be needed here, so let's see if Support has availability for this case or please open a case with a correct license. In the meantime, have you tested the rest speeds on this drive outside of Veeam? Use https://www.veeam.com/kb2014 and test using the random read parameters, and see how the performance is; it should give you an idea of if the drive's read performance is maybe struggling.

[daystrom]

I've used three different drives, all different makes. It's can't be that all three have the same issue. That is noted in the original post.

[daystrom]

Support case is closed. I would appreciate any ideas on this.

[david.domask]

Hi daystrom,

Unfortunate that the case closed, but as noted if possible it's best to try with a license with an active support contract or try the case again.

With the above test, the purpose was to test exactly as the Veeam Agent would independent of Veeam to see how other applications perform; it's understood you tested multiple drives, but establishing a baseline may give some hints. Unfortunately we won't be able to troubleshoot over the forums.

[daystrom]

About a year ago I tested two of the ssds, both 2 tb, a pny and an acer, using CrystalDiskMark 8.0.5 x64, both of which have been deployed as e:. The performance between the two drives was very similar, but of course agent backup to e: was very slow regardless of which ssd was in use as e:.

Maybe there is something about the port that e: uses, though I've never heard of a port that underperforms.

I will be changing the motherboard on that pc soon, keeping the same drives in place, it will be interesting to see if the slow e: backups continue.