The drive is about 76% full but I don't think it's fragmentation since the
transfer of the same ~2 GB file to the portable drive is consistently
relatively fast from a blue or yellow USB port, and very slow from a black USB
port. Here's the output of "df -T /dev/sdb1" with the drive plugged in:
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/sdb1 btrfs 976759808 735116440 239872328 76% /run/media/andre/Seagate
Below is the output from usbview, this is with it plugged into the desktop's
black USB 2.0 port so it's only showing that speed, not the USB 3.0 speed of
the portable drive.
Backup+ BK
Manufacturer: Seagate
Serial Number: NA515PK9
Speed: 480Mb/s (high)
Bus: 2
Address: 3
USB Version: 2.10
Device Class: 00
Device Subclass: 00
Device Protocol: 00
Maximum Default Endpoint Size: 64
Number of Configurations: 1
Vendor Id: 0bc2
Product Id: a013
Revision Number: 01.00
Config Number: 1
Number of Interfaces: 1
Attributes: 80
MaxPower Needed: 100mA
Interface Number: 0
Name: usb-storage
Alternate Number: 0
Class: 08
Sub Class: 06
Protocol: 50
Number of Endpoints: 2
Endpoint Address: 02
Direction: out
Attribute: 2
Type: Bulk
Max Packet Size: 512
Interval: 0ms
Endpoint Address: 81
Direction: in
Attribute: 2
Type: Bulk
Max Packet Size: 512
Interval: 0ms
--
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