I have a Kingson USB stick that is very slow to mount in GNU/Linux. I would guess closer to 20 to 30 seconds to mount each time. It mounts in MS-Windows-7 a bit faster (maybe 10 seconds or so) albeit it is slower than my other USB sticks in Windows-7.
This USB stick is a small device and it has two ports - one USB for PCs and on the other end a USB for Smartphones/Tablets. It also mounts very slow under Android GNU/Linux (also 20 to 30 seconds to mount).
I am happy with this USB device, but I thought I would note it here in this thread in case there is any similarity to the slow mounting “behaviour” you noted in a different device.
Some outputs (using a USB-3.0 port on my ultrabook):
530.499709] usb 3-1: new high-speed USB device number 4 using xhci_hcd
530.670198] usb 3-1: New USB device found, idVendor=0951, idProduct=16a1
530.670208] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
530.670214] usb 3-1: Product: DT microDuo
530.670218] usb 3-1: Manufacturer: Kingston
530.670222] usb 3-1: SerialNumber: 50E549C34436BEC029097BA2
530.703441] usb-storage 3-1:1.0: USB Mass Storage device detected
530.703560] scsi6 : usb-storage 3-1:1.0
530.703692] usbcore: registered new interface driver usb-storage
530.704641] usbcore: registered new interface driver uas
531.729056] scsi 6:0:0:0: Direct-Access Kingston DT microDuo PMAP PQ: 0 ANSI: 4
531.729431] sd 6:0:0:0: Attached scsi generic sg1 type 0
542.244089] sd 6:0:0:0: [sdb] 61457664 512-byte logical blocks: (31.4 GB/29.3 GiB)
542.244328] sd 6:0:0:0: [sdb] Write Protect is off
542.244336] sd 6:0:0:0: [sdb] Mode Sense: 23 00 00 00
542.244547] sd 6:0:0:0: [sdb] No Caching mode page found
542.244552] sd 6:0:0:0: [sdb] Assuming drive cache: write through
542.269908] sdb: sdb1
542.271386] sd 6:0:0:0: [sdb] Attached SCSI removable disk
and
linux-0w6l:/home/oldcpu # hdparm -t /dev/sdb
/dev/sdb:
Timing buffered disk reads: 60 MB in 3.02 seconds = 19.84 MB/sec
and
oldcpu@linux-0w6l:~> lsusb
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 04f2:b369 Chicony Electronics Co., Ltd
Bus 001 Device 004: ID 8087:07da Intel Corp.
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID 046d:c52f Logitech, Inc. Unifying Receiver
**Bus 003 Device 004: ID 0951:16a1 Kingston Technology **
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
and
oldcpu@linux-0w6l:~> hwinfo --usb
02: SCSI 600.0: 10600 Disk
[Created at block.245]
Unique ID: KRJj.3nhv4cmf7eC
SysFS ID: /class/block/sdb
SysFS BusID: 6:0:0:0
SysFS Device Link: /devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1:1.0/host6/target6:0:0/6:0:0:0
Hardware Class: disk
Model: "Kingston DT microDuo"
Vendor: usb 0x0951 "Kingston"
Device: usb 0x16a1 "DT microDuo"
Revision: "PMAP"
Serial ID: "50E549C34436BEC029097BA2"
Driver: "usb-storage", "sd"
Driver Modules: "usb_storage"
Device File: /dev/sdb (/dev/sg1)
Device Files: /dev/sdb, /dev/disk/by-id/scsi-1USB_DISK_2.0, /dev/disk/by-id/scsi-28765432ab567abcd, /dev/disk/by-id/scsi-32000acde48234567, /dev/disk/by-id/scsi-SKingston_DT_microDuo_5B0EEC504299, /dev/disk/by-id/wwn-0x2000acde48234567, /dev/disk/by-path/pci-0000:00:14.0-usb-0:1:1.0-scsi-0:0:0:0
Device Number: block 8:16-8:31 (char 21:1)
Speed: 480 Mbps
Module Alias: "usb:v0951p16A1d0100dc00dsc00dp00ic08isc06ip50in00"
Driver Info #0:
Driver Status: uas is active
Driver Activation Cmd: "modprobe uas"
Driver Info #1:
Driver Status: usb_storage is active
Driver Activation Cmd: "modprobe usb_storage"
Drive status: no medium
Config Status: cfg=new, avail=yes, need=no, active=unknown
.