Environment is VMware 4.1, 2 ESXi servers with a iSCSI 6TB datastore with 1.5TB free. ~30 VMs, small load, VMs working well.
On the datastore I have an ISOs folder. Typically, I can upload new ISOs there that VMs can mount. Today I have a problem uploading a new ISO. The "Uploading..." dialog pops up, hangs for a while, and then the "I/O Error Occurred" displays. I have tried this with 2 ISOs, one 4GB and another 600MB. The ISOs are on the desktop of a standalone 2008 R2 server that I use for a few things, including Veeam backups and vCenter server.
I then tried the opposite, downloading a small floppy image from the same folder, to my desktop. It drew the file on the desktop in preparation of downloading, but then errored out with the same "I/o error occurred".
I logged out of vCenter client, back in - still failed. I logged out of my personal login to vCenter and back in as administrator, still failed. I rebooted the server and logged in as administrator, still failed.
Search pulled up a thread with similar behavior. I checked, my HP DL360G5 with Broadcom GigE NICs are set to Auto. "I/O Error Occurred" in vSphere Client working with ESXi I changed the Broadcom NIC's setting from Auto to Gbps, relogged into vCenter client - and no change.
Anyone have any advice?
Followup: I was able to delete a large unneeded ISO freeing up an additional 7GB. I re-attempted uploading the 600MB ISO with the same lack of success - I/O error occurred.