Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

I have bought a two Kingston USB sticks, with 8 Gb & 32 Gb I wonder if they run to slow. It seems that the biggest run faster with Ext4.

Question: Do these two USB stick run enough fast or are they broken?

Question: Why does one USB stick run much faster with Ext4, but the other does not?

Finally my opinion is that boht USB sticks are mad of a very low cost technology in comparison with USB Hard Drive or an USB SSD, but I can be wrong. I could run hdparm -I against all my hard disk and my USB hard disk, but not against both USB Sticks.

Why do I really make this question? This question comes from: Can I Install grub on an USB and make it a rescue disk?, because I wanted to know if I could make a clean installation of Ubuntu in a USB drive. Now I see that perhaps it depends on the quality of this drive.

srs@ubuntu:~$ dmesg | grep -i sdb
[    3.277465] sd 6:0:0:0: [sdb] 15138816 512-byte logical blocks: (7.75 GB/7.21 GiB)
[    3.279611] sd 6:0:0:0: [sdb] Write Protect is off
[    3.279683] sd 6:0:0:0: [sdb] Mode Sense: 2f 00 00 00
[    3.281741] sd 6:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[    3.288860]  sdb: sdb1
[    3.294503] sd 6:0:0:0: [sdb] Attached SCSI removable disk
srs@ubuntu:~$ dmesg | grep -i sdc
[  175.121840] sd 7:0:0:0: [sdc] 60437492 512-byte logical blocks: (30.9 GB/28.8 GiB)
[  175.122604] sd 7:0:0:0: [sdc] Write Protect is off
[  175.122609] sd 7:0:0:0: [sdc] Mode Sense: 45 00 00 00
[  175.123112] sd 7:0:0:0: [sdc] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[  175.127221]  sdc: sdc1
[  175.129221] sd 7:0:0:0: [sdc] Attached SCSI removable disk

srs@ubuntu:~$ sudo hdparm -Tt /dev/sdb1       // sdb1 is a partition with 6 Gb of Fat32

 Timing cached reads:   23052 MB in  2.00 seconds = 11537.47 MB/sec
 Timing buffered disk reads:   56 MB in  3.09 seconds =  18.11 MB/sec

srs@ubuntu:~$ sudo hdparm -Tt /dev/sdb2      // sdb2 is a partition with 2 Gb of Ext4

 Timing cached reads:   22668 MB in  2.00 seconds = 11345.37 MB/sec
 Timing buffered disk reads:   58 MB in  3.06 seconds =  18.95 MB/sec


srs@ubuntu:~$ sudo hdparm -Tt /dev/sdc1      // sdc1 is a partition with 16 Gb of Fat32

 Timing cached reads:   25156 MB in  2.00 seconds = 12591.29 MB/sec
 Timing buffered disk reads:   56 MB in  3.02 seconds =  18.52 MB/sec

srs@ubuntu:~$ sudo hdparm -Tt /dev/sdc2      // sdc2 is a partition with 16 Gb of Ext2

 Timing cached reads:   23476 MB in  2.00 seconds = 11749.46 MB/sec
 Timing buffered disk reads:  106 MB in  3.00 seconds =  35.30 MB/sec

enter image description here

share|improve this question

closed as not a real question by mikewhatever, dobey, izx, hbdgaf, RolandiXor Aug 28 '12 at 2:40

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

What is the question exactly? –  dobey Aug 27 '12 at 18:26
@dobey. I have updated my 3 questions. –  Salvador Aug 27 '12 at 18:38
When you perform a S.M.A.R.T disk benchmark, the file system is irrelevant, since it simply does not care about file systems. –  Cumulus007 Aug 27 '12 at 19:39
@Cumulus007 I have performed a simple benchmark, these USB sticks does not support SMART, however you are true, both benchmarks graphs come from different sticks but not from different partitions. –  Salvador Aug 27 '12 at 19:44
sounds like a very interesting question to me... maybe you should reformulate it to something like "can ext4 make the USB drive considerably faster?" and be much more specific. –  Cawas Nov 13 '12 at 16:25
add comment

Browse other questions tagged or ask your own question.