are these stats real? HDD with 1000 iops?

[uberwebguru]

I just checked the disk stats of the exos X20 20TB HDD drive in XCP-ng host and i saw these
but they dont look correct IOPS reaches 1000; Is that real reading?

the reading came when migrating bunch of VMs across hosts

 

[uberwebguru]

Now even up to 2500 IOPS
Anyone comment how this is possible with SATA HDD?

 

[Arwen]

Sometimes the drive cache can make a difference. Especially for small changes.

Long time ago with Solaris, (before ZFS), I would mirror the disks with Disk Suite during the server build process. In order to make it finish faster, I would enable the write cache on the destination disk(s). This would about double the speed at which it the mirror re-sync worked. Afterward, I would restore the default setting and disable the write cache.