My USB Drive goes half speed on Arch

Dear Archers:
I have a problem when running my USB hard drive (of 1 TB) on my Arch laptop. For some reason, the drive, which is a USB 3.0, copies files from the external to the internal drive at about 30 MB/s. Doing the "same" task with the "same" files on the "same" USB 3 port on the "same" laptop on other Debian-based distros results in a transfer rate of 60 - 100 MB/s. Am I missing some package to run at full speed with my Arch system?
Another thing that I've also noticed is that there's a delay of more than 1 minute when I try to mount the drive. This doesn't happen on other distros.
Any hint or suggestions are welcome!
Thanks in advance

Ok guys. An annoying update here.
The problem with this external drive achieved a new level of difficulty for me. Yesterday the problems were a slow mount (over a minute) and slow transfer rates for both writing and reading data. Today I got back home and tried to plug the drive once again and the freaking thing just won't mount at all!. The hard drive appears in the list of detected devices and on my file manager, but when I click on it to open the folder and get it to mount, the complete file manager freezes. I have to unplug it and try again. I have to repeat these steps something like four or five times in order to see the content (I was really really scared when I experienced this because I thought the drive was broken, but I tried it in another PC and everything was showing correctly).
I'm starting to get desesperate...I constantly write data to back it up for job purposes. Hopefully I'll solve this thing, or you guys can throw some more technical help at me.
In case it matters: The external drive is a USB 3.0 (brand Verbatim) of 1 TB, I keep the default filesystem that drive was using as factory default (I think is NTFS). I have Arch Linux updated as of today, with the latest stable packages. I run Arch with Ubuntu's Unity in UEFI mode as the only OS. I tried other file managers as well including KDE's Dolphin, Thunar, PCManFM and Nemo but no avail.
Last edited by Silex89 (2014-03-26 00:09:20)

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Good day almighty All,
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In some cases useful info is found in syslog - try
dmesg | tail or so
I ran fsck on other laptop (Fedora 17) and got file system fixed but empty (well, lots of errors, everything was linked under lost+found).
RIP my backup (I have a copy on the storage and this one will be accessed via network only
I re-created FS (ext3), copied on it couple gigs of test files, connected drive to dell, mounted FS, "ls" the dir, all good.
Unmounted FS, mounted again - get what is quoted above - I/O errors.
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1. external drive can be mounted without problem when it is just connected to Arch
2. After some data traffic it starts to produce I/O errors.
3. When good FS is unmounted and then mounted again the story is the same - I/O errors.
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Below is some info about installation:
System is installed on encrypted with Luks LVM partition.
External HDD is not encrypted.
[root@darkstar ~]# uname -a
Linux darkstar 3.6.3-1-ARCH #1 SMP PREEMPT Mon Oct 22 10:23:56 CEST 2012 x86_64 GNU/Linux
[root@darkstar ~]# pacman -Suy
:: Synchronizing package databases...
core is up to date
extra is up to date
community is up to date
:: Starting full system upgrade...
there is nothing to do
[root@darkstar ~]#
# dmesg after connection of USB drive
[Nov 2 14:08] usb 2-1.1: new high-speed USB device number 8 using ehci_hcd
[ +0.085473] scsi8 : usb-storage 2-1.1:1.0
[ +1.002053] scsi 8:0:0:0: Direct-Access Mass Storage Device PQ: 0 ANSI: 0
[ +0.001279] sd 8:0:0:0: [sdb] 976773166 512-byte logical blocks: (500 GB/465 GiB)
[ +0.000664] sd 8:0:0:0: [sdb] Write Protect is off
[ +0.000011] sd 8:0:0:0: [sdb] Mode Sense: 03 00 00 00
[ +0.000562] sd 8:0:0:0: [sdb] No Caching mode page present
[ +0.000011] sd 8:0:0:0: [sdb] Assuming drive cache: write through
[ +0.002354] sd 8:0:0:0: [sdb] No Caching mode page present
[ +0.000011] sd 8:0:0:0: [sdb] Assuming drive cache: write through
[ +0.049185] sdb: sdb1 sdb2 sdb3
[ +0.003149] sd 8:0:0:0: [sdb] No Caching mode page present
[ +0.000022] sd 8:0:0:0: [sdb] Assuming drive cache: write through
[ +0.000006] sd 8:0:0:0: [sdb] Attached SCSI disk
[Nov 2 14:09] usb 2-1.1: reset high-speed USB device number 8 using ehci_hcd
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There was also XFS volume on the same VG.
[Nov 2 14:15] EXT4-fs (dm-8): mounted filesystem without journal. Opts: (null)
[Nov 2 14:16] EXT4-fs (dm-8): VFS: Can't find ext4 filesystem
[ +0.036964] EXT4-fs (dm-8): VFS: Can't find ext4 filesystem
[ +0.026500] EXT4-fs (dm-8): VFS: Can't find ext4 filesystem
[ +0.040551] XFS (dm-8): bad magic number
[ +0.000023] XFS (dm-8): SB validate failed
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Thanks,
Eugene.

Little bit of testing, just out of curiousity - do not have time to dig into it, sorry.
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[root@darkstar test]# uname -a
Linux darkstar 2.6.32-279.11.1.el6.x86_64 #1 SMP Tue Oct 16 15:57:10 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
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10+0 records in
10+0 records out
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[root@darkstar test]# dd bs=512 count=10 if=/dev/sdb status=noxfer |od -tax1
0000000 a a a a a a a a a a a a a a a a
61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
0012000
10+0 records in
10+0 records out
[root@darkstar test]# uname -a
Linux darkstar 2.6.32-279.11.1.el6.x86_64 #1 SMP Tue Oct 16 15:57:10 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
[root@darkstar test]# uname -a
Linux darkstar 3.6.7-1.el6.elrepo.x86_64 #1 SMP Sun Nov 18 08:35:06 EST 2012 x86_64 x86_64 x86_64 GNU/Linux
[root@darkstar test]# perl -e 'print "7"x5120' |dd bs=512 count=10 of=/dev/sdb
10+0 records in
10+0 records out
5120 bytes (5.1 kB) copied, 0.303432 s, 16.9 kB/s
[root@darkstar test]# dd bs=512 count=10 if=/dev/sdb status=noxfer |od -tax1
10+0 records in
10+0 records out
0000000 U S B C : soh nul nul nul dc4 nul nul nul nul nl *
55 53 42 43 ba 01 00 00 00 14 00 00 00 00 0a 2a
0000020 nul nul nul nul nul nul nul nl nul nul nul nul nul nul nul ^
00 00 00 00 00 00 00 0a 00 00 00 00 00 00 00 de
0000040 a a a a a a a a a a a a a a a a
61 61 61 61 61 61 61 61 61 61 61 61 61 61 61 61
0001000 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37
0012000
[root@darkstar test]# uname -a
Linux darkstar 3.6.7-1.el6.elrepo.x86_64 #1 SMP Sun Nov 18 08:35:06 EST 2012 x86_64 x86_64 x86_64 GNU/Linux
[root@darkstar test]#
Last edited by Eugene (2012-11-26 01:15:46)

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Original post:
Hi there!
I'm fairly new to the arch (and linux) scene and just setup my Samsung 530U3B with a brand new installation of arch. Everything went fine and the system is running flawlessly. Almost.
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DSpider wrote:
The boot priority is set to usb drive first
Welcome to the forum.
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I just figured it out. In my BIOS under 'Advanced' the 'Fast BIOS Mode' was enabled, once i disabled it, everything went fine. I don't remember changing that option. Silly me.
Sorry for your time
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