Hello,
I just did a fresh install of ESXI 6.7 on my home lab server. (i7 2600 on intel motherboard)
The VMs are running fine, all stored on SSD.
I wanted to make a backup of the VMs from the SSD on a WD 1TB drive and the transfer is extremely slow.
For example, a Windows 10 VM thin provisioned that use actually about 30 GB took more than 2 hours.
I did the copy with the datastore management.
Is that any normal?
I remember on ESXI 5.5 the transfer was way more quicker.
Exact setup is:
- intel i7 2600
- motherboard intel DZ77GA-70K
- Samsung 860 EVO SSD and WD Blue 1To (both VMFS 6)
- Both drives connected to the same sata controller (intel one)
Thanks a lot for the help, and have a nice day!
Have you tried a smaller VM? Are average transmission rates all slow?
Thanks for your reply.
Yes, all transfer are slow between datastores, whatever the VM's size.
But i noticed that uploading or download on datastores from desktop PC is good (~110MB/s)
Makes it even stranger..
Hello,
A little bump of this thread..
I saw in the vmk warning log something like:
"ScsiDeviceIO: 1199: bla bla sata device :Deviceperformance has deteriorated. I/O latency increased value etc"
This line repeats several times with latency always bigger, and then:
"NMP: nmp_DeviceRequestFastDeviceProbe:237: NMP device bla bla sata device state in doubt; requested fast path state update..."
I dont know if this could be related to my problem.
I also read that the native vmw_ahci driver sometimes causes problems.
Should i switch to the legacy linux driver?
I'm a bit afraid to make this move...
Thanks again for your replies!
Hi,
Thread bump again..
Just to say that i tried to disable the native esxi driver and let the legacy one to load.
No change in speed in datastore or between datastores.
I give up on this
Hi,
Not exactly sure what this means:
I did the copy with the datastore management.
But FWIW, after reading this thread I suspect that the WD Blue disk is not performing well in your config.
--
Wil
Hi,
Sorry for late answer..
I meant to copy file with the datastore's files manager. The one on the web interface.
The WD Blue disk is old but functionnal. No SMART error or anything.
I did installed GhettoVCB and made a script to backup all the VM.
With GhettoVCB it copy at a constant 96MB/s which is pretty good.
I think that when i do copy VM with the datastore's file manager, the system inflates VMDK files, hence the slow rate and long time copy.
Thanks again for your replies and have a nice day!