Ubuntu :: USB Flash - How To Make Write Speed Quicker
Jul 25, 2010
Does anyone know why the write speed of usb flash would be so slow? I'm running ubuntu off my flash drive but it is running really slow. I've tested the read speed which was about 33 meg a sec. But the write speed is only about 7 meg a sec. When running ubuntu it is very slow, not tolerable at all. I've read on some sites that there is a way to fix this but I'm not finding any good tutorials on making the write speed quicker.
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Jul 1, 2010
Running Opensuse 11.1 on an HP laptop. When I resume from hibernation or standby, I usually have to wait for about a minute for the wireless card to find my router. Is there any way to speed up this time to connect process ?
Interestingly when I boot from cold, the wireless connection is most times ready to go as soon as the boot has finished. So just wondering how I can make things quicker for resume from standby or hibernation
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May 22, 2010
Here's the line from my fstab that auto mounts my NTFS Windows drive:
/dev/sda1 /media/disk ntfs-3g defaults,umask=007,gid=46,noatime 0 0
When writing to the drive the max speed I get is 5 megabytes per second. I Googled it and tried some other posted Fstab lines but all disabled my write access for some reason even without "RO" in the line. Can someone please give me some guidance as to how I get the normal Sata HD transfer speed which is more like 55-75 megs or more per second or so?
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May 10, 2010
I have what seems to be a hard disk Write speed problems with my first hard drive. Timing the cp command of a 700 Meg file takes about 8 secs from disk 2 to 3 but takes 25 minutes from disk 2 to disk 1.
Here are the details:
Kubuntu 9.04 (Kernel 2.6.28-15-generic)
Hard Disk 1 : /dev/sda (WDC WD2500KS-00MJB0)
Partitioned
/dev/sda1 ext3 / 10 Gigs
/dev/sda2 extended 222 Gigs
/dev/sda5 linux-swap 2 Gigs
/dev/sda6 ext /home 220 Gigs
Hard Disk 2 : /dev/sdb (WDC WD2500AAKS-00F0A0)
Partitioned :
/dev/sdb1 ntfs 16 gigs
/dev/sdb2 xfs /home/eric/data_drive 216 Gigs
Hard Disk 2 : /dev/sdc (ST3500320AS)
Partitioned:
/dev/sdc1 xfs /home/eric/data_drive2 465 Gigs
By doing 'time cp ...sdb1/test.avi ...sdc1' takes about 8 seconds and same vice-versa. the command 'time cp ...sdb1/test.avi ...sdb1/test1.avi takes about 11 seconds and the same holds true if sdc1 is used But copy sdb1 or sdc1/test.avi to either sda1 or sda6 and it takes 25 minutes. Same problem if I copy from the same drive partition (sda). I have booted a livecd Knoppix 6.2 and the same problems happens.. So safe to say it's not Kubuntu. The only thing that is left to do is backup and reformat the partitions as XFS and try again. I also did a full smartcontrol Extended test and no errors. Checked all the various logs and nothing found.
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Apr 14, 2011
I started a thread in the hardware section, but I've narrowed it down to being a software issue. The problem is that all USB devices are written to at about 1MB/s, and is read at equally slow speeds. After testing my computer on an older Ubuntu release (8.04 32bit), I verified it wasn't a hardware issue, because the read and write speeds were like they were supposed to be. Then, I downloaded the 32bit release of the Ubuntu version I'm currently using (an up-to-date version of Natty) and booted the live cd of it. It was equally slow there as well.
The read/write speeds are equally poor on openSUSE and Arch Linux, so I don't think that it's an issue with Ubuntu, as much as it seems like a kernel issue (or maybe not, you guys can correct me if it seems like it isn't ).
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Jul 5, 2011
I am hoping someone can help me I setup a brand new ubuntu 11.04 64bit system with:-AMD Phoenom 840 (3.7GHz overclocked) 8GB DDR3 RAM.WD20EARS x 4madmin (RAID5) SetupFor some reason I cannot get the write speed above 15mb/s & I have tried modifying the cache_Stripe_size from 256 to 8192.My read speeds are great burst at 120mb/s & stable at about 60mb/s.The only other possiblility is it could be my HDs which I read causes slow writes not sure if thats true though. point me in the right direction so I can fix this issue as I don't want to move to the dark side (Windows) .
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Jul 6, 2010
I just tried NFS for the first time after reading that it's considerably faster than SSHFS, which I currently use, but I'm experiencing slow write speeds and problems while copying files in nautilus.
[Code]...
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Sep 14, 2010
I got a new machine with GA-p55A-ud3 mobo and a WDC WD10EARS 1T disk.
When I tried to benchmark the disk IO, I was suprised by the low write speed:
The related output from my lspci:
The related output from my lshw:
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Jan 5, 2011
I have recently migrated my file server over to a HP Microserver. The server has two 1TB disks, in a software RAID-1 array, using MDADM. When I migrated simply moved the mirrored disks over, from the old server Ubuntu 9.10 (server) to the new one 10.04.1 (server).I Have recently noticed that write speed to the RAID array is *VERY* slow. In the order of 1-2MB/s order of magnitude (more info below). Now obviously this is not optimal performance to say the least. I have checked a few things, CPU utilisation is not abnormal (<5%) nor is memory / swap. When I took a disk out and rebuilt the array, with only one disk (tried both) performance was as to be expected (write speed >~70MB/s) The read speed seems to be unaffected however!
I'm tempted to think that there is something funny going on with the storage subsystem, as copying from the single disk to the array is slower than creating a file from /dev/zero to the array using DD..Either way I can't try the array in another computer right now, so I though I was ask to see if people have seen anything like this!At the moment I'm not sure if it is something strange to do with having simply chucked the mirrored array into the new server, perhaps a different version of MDADM? I'm wondering if it's worth backing up and starting from scratch! Anyhow this has really got me scratching my head, and its a bit of a pain! Any help here would be awesome, e-cookies at the ready! Cheers
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Sep 14, 2010
I got a new machine with GA-p55A-ud3 mobo and a WDC WD10EARS 1T disk. When I tried to benchmark the disk IO, I was suprised by the low write speed:
[Children see throughput for 1 initial writers = 35962.63 KB/sec
Parent sees throughput for 1 initial writers = 35962.63 KB/sec
Min throughput per process = 35962.63 KB/sec
[code].....
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Aug 4, 2011
I had a F14 samba server working flawlessly now for a quite time. Unexpectedly about a month ago the write speed slowed down around 64kbit/s and that's really slow. I haven't changed any configs, only updated the server. I've troubleshooted this from many angles:
-It is not a network issue because sftp writes are good.
-It is not a RAID1 issue because write speed from another directory (locally) are good.
So basically samba is the only thing left.
Here's example from smb.conf:
[MyShare]
comment = My share
path = /mnt/RAID_share
writeable = yes
browseable = yes
writelist = +smbuser
Here's a snip from logs today:
[2011/08/04 09:04:27.509273, 1] smbd/server.c:267(remove_child_pid)
Scheduled cleanup of brl and lock database after unclean shutdown
[2011/08/04 09:04:47.526336, 1] smbd/server.c:240(cleanup_timeout_fn)
Cleaning up brl and lock database after unclean shutdown
[2011/08/04 09:17:57.634660, 1] smbd/server.c:267(remove_child_pid)
Scheduled cleanup of brl and lock database after unclean shutdown
[2011/08/04 09:18:17.635196, 1] smbd/server.c:240(cleanup_timeout_fn)
Cleaning up brl and lock database after unclean shutdown .....
There's a restart that is not software related.
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Dec 13, 2010
About NFS.
Server:
Client(s):
Code:
I have followed Robbie Workmans' HowTo [url]
Reading and writing works absolutely fine with small files but large files are tediously slow in writing to the server. (rw,no_subtree_check) are options in exported directories.
What is your experience with NFS and how can I speed up large file/folder transfer(write) speeds?
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Jun 28, 2010
I am new to Centos and linux in general. I have just got myself a Dell 1950 server with 2x 1T SATA2 hard disks in it. now the server comes with a PERC5i Raid card with 512Mb. Well I put these in raid 0 and the raid card initilzed the disks to 128 writeback and read ahead. When I loaded centos it did not recognize the dell layout so therefore wanted to initalize it again, so I done this as it wanted. Now I created a 80gb boot and o/s partition and a 100gb swap the rest was created into LVM space to run solus vmwear. But I found the raid 0 to be getting extreamly slow read and write speeds.
Example same disks
Desktop PC max 214mb/s windows vista 64
Server with centos 104mb/s
Now I am not sure but I am told that I need to align the o/s with the raid card settings but I have no idea how to do this. How to do this in plain easy step by step instructions. I mean how to calculate it, how to format the disk this way, and what files to edit where if needed. I have spent hours trying to figure out why my raid 0 is slower than a single disk.
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Mar 23, 2011
I've been practicing C programming the past month and had the idea to do this. I don't know if there's already something similar, or if anyone would find this program useful.Slervice simply calls Pat's scripts and the chmod command. I believe it's self explanatory. It can be compiled with cc slervice.c -o slervice.
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Oct 27, 2010
This was working a few days ago - so I'm thinking an update might be the culrpit.Ubuntu 10.10 on AMD 64. ATI RV710 video card.Flash & Totem now playback at double speed. MP3 audio and Flash Videos both exhibit the same behavior. Tried a plain old reboot - no change. Looking at the diff between dynamic libaries of libflashplayer and totem shows about 45 shared libraries but that doesn't really narrow it down much..
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Aug 19, 2010
System: Linux flashvoyager 2.6.32-23-generic #37-Ubuntu SMP Fri Jun 11 07:54:58 UTC 2010 i686 GNU/Linux Ubuntu 10.04 Installed onto 64gig Flash Voyager GTR plugged into Tosh satpro laptop dual core 4 gig memory. This is not a casper r/w persistent install version. This is installed directly onto the flash pen and running as if the flash drive was a solid state disc.
I have obtained a 64gig which can read at 34mb/s and write at 28mb/s. The reason I wanted this was so I could install linux ubuntu and run the OS straight of the flash as if it was a Solid state disc. I have tried using the pendrivelinux method where the persistent data is stored inside a virtual file system but I found it did not allow grub or kernel updates without the need to rebuild the entire datapen plus I did not know how to get rid of the live boot menu where it asks for language and the like.
I boot the pen straight into linux ubuntu 10.04 via the bios boot menu and select the usb pen drive. Once into grub I select the most recent kernel and then load up ubuntu. When I first started using the distro from the pen the speed of the web browsing was so slow. I have since configured the browser to store the cache inside tmpfs /media/ramdisk and browsing seems fine now however there is underlying speed issue with using the method of install. Uncompressing installs takes an age. I have configured fstab like so:
#System
proc /proc proc nodev,noexec,nosuid 0 0
/dev/sdb1 / ext4 errors=remount-ro 0 1
[code]....
PS: I am not allowed to use the HDD on the laptop since it is company laptop. My previous company laptop had Kubuntu 8.04 with XP as VM. Also having the install on the flash drive would give me the convenience of booting the pen from any hardware.
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Dec 10, 2009
I am currently using fedora 12. My question is why is the speed for my yum and rpm are very slow. Something like Flash Player 10 couldn't even load after being installed. If I downloaded the rpm, the speed is like normal but if I yum it. The ESA took like >1,000,000 sec..or whatever..The point is it does seem like something has happened to my yum/rpm function. I can download and surf the web as usual. I just can't get any add-on such as the Flash Player 10. I can only use the basic already provided by Fedora.
I tried:
su -
yum clean all
rpm --rebuilddb
yum update
but I am still unsure what type of RPM issue I am facing.
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Jun 12, 2010
Is there a possibility to use a flash drive as a speed up for conventional hard disks? I got the idea to redirect all read ops to the flash drive if the data is already stored there, and to read from the conventional disks if the data is not found there (and during idle time the freshly accessed data from the conventional disk is stored on the flash disk).
Is this already possible with linux standard tools?
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Jan 7, 2010
I can connect to the internet fine, but it refuses to go any quicker than 1mbit. Below is my recent result from [URL]
My iwconfig shows...
Code:
lo no wireless extensions.
eth0 no wireless extensions.
wmaster0 no wireless extensions.
[code]....
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Feb 27, 2010
I have this issue: i can't write in Cyrillic inside my flash application: http:[url]....I can't write if i type from keyboard. At the place of normal characters i get some strange ones.If i use the virtual keyboard included in my program, it works properly.(now i use Karmic, but this problem there was also in previous editions)I think should be something about fonts, but i don't know exactly what to do.
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Oct 12, 2010
I have a flash drive that is write protected and in RAW format(so not formatted). I've tried everything I can find to make it usable again in Windows but I ran out of options. I quickly found about the Gnome Partition Editor, but when I try to start it, it gets an icon in the taskbar that says "Starting GParted" and then it closes. Is some other way I can format my flash drive or do I need to find out why gparted isn't running?
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Nov 2, 2010
I have this Lumix G2 camera from Panasonic. Problem is that I cannot put any files on cameras memory card from Ubuntu via usb. I need it to put firmware updates for the camera.
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Feb 17, 2011
I am having a very weird problem, of which I have never heard before. The problem, shortly (I will give details in the following), is that the copy speed between the partition in which I am running my Fedora and another partition where I store backup data is 50K/s, which is extremely slow (it has been usually around 10M/s, almost 200 times faster).
My laptop is a HP Pavillion Dv7 2080 ep, in which I have two disks of 250G. One of the disks is partitioned between two operational systems, Fedora 14 64 and Windows 7 64, and the other disk contains the above referred partition where I store my backups (lets call it backup disk). The problem happens ONLY when I try to copy anything from my home in Fedora to the backup disk. I first thought it could be a problem in the backup disk. Then I login into the windows and made a copy of some AVI files (3G approx) to the backup disk, which went normally, within a few seconds, thus eliminating this possibility. I try therefore to make the inverse process, a copy from the backup disk into my home folder in Fedora. It went normally, copying 4 G also within few seconds, actually with an excellent speed of 50M/s. After searching in google, I saw some people also complaining of slow copy speed (although they had 7M/s, more than 100 times faster than what I have now), and one cause could be that the source file system (in my case the Fedora home folder) would be near its full capacity. I therefore eliminate everything that I could, around 15G, and now I have like 20G of free disk space, which I think is more than enough for everything. However, the problem persists. Some people also said that it could be the type of files and/or amount of data. I therefore tried several kinds of files (from raw data files to AVI and RMVB regular video files), and several amounts of data (from single files with a few Megas to folders with 20G) and in all cases I had the same unacceptably low copy speed of 50K/s.
It seems to be a problem in the software, caused by the updates, since until 10 days ago it was everything ok. However, I usually make the updates whenever they appear but make my backups much less frequently. Therefore I don't know for sure what has changed in Fedora through the updates since the last backup I made, when everything was working fine.
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Feb 3, 2011
Every time I turn on opensuse, I have to go into terminal as superuser and type:
/sbin/ethtool -s eth0 duplex full autoneg off
But this is only a temporary change.
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Jul 1, 2010
I've installed Ubuntu 10.04 and is seems great! now I would like to know what do I have to do in order to enable it to write Hebrew? is there any guide that explains how to install other languages as well?
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Aug 27, 2011
I have problem with umounting usb flash drives. When I insert usb flash and copy big files to it ( 400MB ) copy process is quick ( system use cache to store files ). After this when I umount this drive, after 1 minute I got error that this drive cannot be unmounted ( because cache is not stored in drive, umount time limit I think ). How to disable write cache to usb flash drives, change its size or change umount timeout.
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Jan 12, 2010
i know that chmod +x makes a certain file executable but how do i make a file read and write.
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Jul 23, 2011
i want to make pen drive as write protected for ubuntu and windows.....how to do that??? and if i want to write on it then how to make remove write protection..
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Nov 18, 2010
I have a USB stick of 8GB with two partition. Can I make one partition write protected? How?
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Jan 21, 2010
I used to be able to write to my SD memory card but just recently it is being automatically mounted as read-only. I checked the read-only tab and tried to set it to the lock position, and to the unlock position. Neither position makes a difference. It was working normally a few days ago. I also tried changing the permission using su
ls -lt gives the following result
drwxr-xr-x 4 col root 16384 1970-01-01 01:00 CANON_DC
chmod chgrp and chown in su mode don't change anything either.
I tried mounting a different 1GB SD card and it works perfectly. I noticed that when I mount this card I get a window asking me what I want to do, but I don't get this on the other card. It must some kind of setting related to the unwriteable card.
I am using F10 2.6.27.41-170.2.117.fc10.i686
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