USB storage causes high IO delay

Seqway

Active Member
Dec 1, 2018
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Hello,
I connected an external SSD drive to my server (Intel NUC) and put it on USB3 connection.

This disc I had formatted with fdisc (before it had sdb1, sdb2 and sdb3) - deleted all partitions and created a new primary partition, which worked fine.
I mounted it manually to a folder and I can connect to it. Also I made an entry into the fstab !
Everything works fine and I brought the usb disc into proxmox as directory. I tested it and made a backup on this usb disc and it worked fine. So all seems to be well.

Now the problem:
If I go under Proxmox under DISC and click on it nothing happens and the IO delay goes nearly to 100% and no information will shown to me neither for sda nor for sdb disc. Before I connected the usb disc I could connect to the proxmox options DISC and the results were shown. now not longer possible.

Can someone explain to me what did I wrong ?

Here some more info:
Code:
lsblk -f
NAME   FSTYPE     FSVER LABEL UUID                                 FSAVAIL FSUSE% MOUNTPOINTS
loop0  ext4       1.0         90cdb5d2-a31f-45e8-a85d-9fd14b25ebaa               
loop1  ext4       1.0         08877b08-ba11-4a41-ac33-d15c1fbc7ecb               
sda                                                                               
├─sda1                                                                           
├─sda2 vfat       FAT32       3742-CE19                                           
└─sda3 zfs_member 5000  rpool 15997265971865665853                               
sdb                                                                               
└─sdb1 ext4       1.0         62333f04-2390-478f-9583-606c7a390ea6    1.7T     0% /mnt/ext_ssd

Code:
lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0aa7 Intel Corp. Wireless-AC 3168 Bluetooth
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 002: ID 1f75:0611 Innostor Technology Corporation IS611 SATA/PATA Bridge Controller

/etc/fstab:
Code:
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
UUID=62333f04-2390-478f-9583-606c7a390ea6 /mnt/ext_ssd ext4 auto,nofail,sync,users,rw   0   0
 
Not under Tasks.

If in the GUI: Datacenter -- your PVE host -- System Log

Or (better, IMHO): from the command line: journalctl
 
OK. If I click on it then after a time I get
Code:
communication error
or a
Code:
timeout 0

this is in the log. nothing special I think:
Code:
Oct 05 13:52:23 pve1 pmxcfs[995]: [status] notice: received log
Oct 05 13:52:36 pve1 pveproxy[161180]: proxy detected vanished client connection
Oct 05 13:53:08 pve1 kernel: usb 2-4: reset SuperSpeed USB device number 2 using xhci_hcd
Oct 05 13:53:55 pve1 pveproxy[161179]: proxy detected vanished client connection
Oct 05 13:54:10 pve1 kernel: usb 2-4: reset SuperSpeed USB device number 2 using xhci_hcd
Oct 05 13:54:39 pve1 pmxcfs[995]: [status] notice: received log
Oct 05 13:54:43 pve1 pveproxy[161180]: proxy detected vanished client connection
 
You can see: "reset SuperSpeed USB device number 2 using xhci_hcd" so usb drives don't work in a server.
take a sata3 drive!
 
Not quite "nothing special" in the log ;-(.
communication error and USB reset. Maybe not related, I don't know...
 
You can see: "reset SuperSpeed USB device number 2 using xhci_hcd" so usb drives don't work in a server.
take a sata3 drive!
Why not ? It's even in the documentation mentioned to store backups and so on. I don't understand this argument and it does not explain the problem. Maybe I should use another formatting disc ?

Not quite "nothing special" in the log ;-(.
communication error and USB reset. Maybe not related, I don't know...
is it now a problem or not ?
 
I don't know if now but something unusual has happened. Maybe the USB connector has been touched / misplaced or something.