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Windows "compressed" drives and backup performance

Memory and Storage - AnandTech Forums - forums.anandtech.com
I could probably post this on the "OS" forum, but it probably belongs here.

The scenario: From my thread on the "OS" forum and possibly other threads here and there, you might know that I have been belatedly building a replacement home-server from some surplus hardware, Hitachi enterprise disks and a SuperMicro 8-port controller with Win Server 2012 R2 Essentials. So far, it has been an interesting project, although some have told me to abandon 2012 R2 and just use Windows 10. I'm not yet ready to do that.

Now . . . . for backup, Win Server Backup (for the server) doesn't work according to my satisfaction. I've looked into AOMEI Server Backupper and Macrium Reflect Server versions -- both priced at $170 to $275. I am not inclined at this point to shell out for either of those softwares. Instead, I've set up a $40 license to Syncback SE from 2BrightSparks to make a week's cycle of full plus incremental backups, and it's working fine as far as I can tell.

The target backup drive is a 2.5" 4TB Seagate Barracuda. I believe it is currently connected to one of the SATA II ports on the motherboard, with both of the SATA III mobo ports occupied for other uses. I'm thinking of moving the drive to the SuperMicro controller on a fifth SATA connection from the second SFF-8087 forward breakout cable. But there shouldn't be much loss (if any) to performance of this drive as currently configured on an SATA II port. Most electro-mechanical disks still have throughputs well within the SATA II limitation.

The source drive of the data is a virtual drive of my Stablebit drivepool -- all drives connected to the SATA III SuperMicro ports, and as far as I can tell, with throughput at or above 150 MB/s. Gigabit Ethernet is still going to cap performance at that level. But the backup represents internal transfer from the SuperMicro controller to the onboard Intel SATA controller.

The target Barracuda drive was set up to use Windows compression to save space. The initial "Full" backups proceed slowly, and I see throughputs between maybe 6 MB/s and 60 MB/s during the backup process.

Is the Windows compression feature slowing down the backup process? Would it make any difference to move the backup target disk to the PCIE SuperMicro controller and an SATA III port?

What's your opinion?

 


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