Debian :: Sata Disk Write Speed Is Very Slow ?

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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Debian Configuration :: Sata Disk Write Speed Is Very Slow

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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Ubuntu :: Very SLOW File Copy Speed (disk To Disk)

Mar 27, 2011

i have amd athlon x2 3gb RAM ddr2 two hdd one 80gb other 1tb in this computer i got only ubuntu all disk in EXT4.i want to copy 10gb many file of 700mb or 1gb ( many linux ISO )the transfer is 1mb/s this is SOOO SLOW.i did a touch /forcefsck just in case but nothing happen it is still slow!!what might be the problem ??

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Ubuntu :: USB Read / Write Speed Unbelievably Slow

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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Server :: Very Slow Raid Performance / Only Write Speed

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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Fedora Networking :: F14 Samba Server With Slow Write Speed

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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Ubuntu Networking :: Mdadmin RAID5 Very Slow Write Speed?

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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Ubuntu Networking :: NFS - Slow Write Speed And Copying Files In Nautilus

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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CentOS 5 Server :: RAID0 - Getting Extremely Slow Read / Write Speed

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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Ubuntu :: SATA II / Error "ata4: Limiting SATA Link Speed To 1.5 Gbps" - Allowing The SSD To Run At SATA II Speeds?

May 1, 2011

I keep getting this error in my log viewer every 2 seconds: Code: ata4: limiting SATA link speed to 1.5 Gbps I have a dual boot SSD and I have run many SMART tests in windows and linux, (using smartmon tools and the disk utility) and the reports are all 100% healthy..... My research shows that this error represents one of the following:

1. Problem with SATA controller
2. Changing BIOS to allow SATA
3. Changing SATA mode to PATA or AHCI
4. Replacing the SATA cable
5. Allowing the SSD to run at SATA II speeds, i.e. 3 Gbps

- Does anyone know how to try number 5, i.e. allowing the SSD to run at SATA II speeds? I am lost here and this problem has caused my machine to crash twice when watching a movie in linux/ ubuntu. (It is worth noting that the crashes have only occurred in linux and I have never had an issue in windows, so it does seem to be a linux setting somewhere, hence why I think it is a "allowing SATA II to run at correct speeds issue")

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Ubuntu :: Write Speed For Hard Disk And / Or Partitions

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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Ubuntu :: Slow Down Hard Disk Rotation Speed?

Jun 10, 2011

I have a big problem my hard drive is works fast all the time and now i hear clicks and scratching and weird stuff from so how can i make it slow down. i cant buy a new one if it breaks down ...

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Hardware :: Can SATA 3 (SATA III) Hard Disk Be Run On Motherboard Which Only Support SATA II

Aug 13, 2010

Can SATA 3 (SATA III) Hard disk be run on motherboard which only supports SATA II, except sacrificing the speed (throughput)?

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Hardware :: Server - Buffered Disk Read Speed Just 3.98MB/s Very Slow ?

Jul 12, 2010

I am having a problem with my CentOS based server where the hard drive speeds are incredibly slow for both of the hard drives installed -

Code:

Timing cached reads: 16512 MB in 2.00 seconds = 8272.92 MB/sec

Timing buffered disk reads: 12 MB in 3.01 seconds = 3.98 MB/sec

I have looked around but do not understand the complexities of rebuilding kernel etc so would need some assistance. I have checked IO_support and it is set to 0

Code:

Here are the results for hardware installed after a quick lspci -v

Code:

If there are any noticeable incompatibilities here and how I could work to speed this up. I only have SSH access and could possibly get a KVM on it as it is currently locked up in a DataCenter.

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General :: Extremely Slow Write On Disk With High CPU Usage / Make It Up?

Sep 4, 2010

My problem is extremely slow write on hard disk and 100% cpu usage and it happens when I want to write something on the hard derive not any other external derive.

Tried a fresh ubuntu install. No change. I am not even sure if it is a software or hardware problem.

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Debian :: External Raid Sys Using E-Sata - Slow

Jul 5, 2011

Have Lian Li Ex 503 External Raid System, using 4x2TB, using Raidmode 10 for good performance [ Just for those who are interested: http://www.lian-li.com/v2/en/product/pr ... ex=115&g=f ]

[Code]...

But using e-sata my transfer rates are very low (from internal drive to external ex503), around 60-70mb/sec
But hdparm tells me:

[Code]...

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Debian :: Slow USB Transfer Speed With MC

Nov 15, 2010

I have a 500gB USB drive connected to my laptop for backups and filestorage. But I can't get it to play nice with Midnight Commander. My transfer speeds max ut at 2MB/s wich is painfully slow when moving large files such as movies. Worker FM transfers the same files to the same drive much MUCH faster (not sure by how much, though). This leads me to the conclusion that the problem lies with MC.

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Debian :: Have Slow Download For Update / Speed This Up?

May 26, 2010

I am using debian(lenny) on a pc coexisting with windows. I use grub to decide which o/s to boot.

I picked debian, logged in as a regular user. I selected "Administration" under the "System" tab and then selected "Update Manager". I had to provide the root password.

I was asked to insert Binary DVD-1 and was told to use smart update. I did at which time 16 files begun downloading at between 4400 B/s and 4800 B/s from the Security server. It looks like it is downloading a new linux image.

Is there any way to speed this up?

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Debian Hardware :: Blu-ray Writing Speed Is Slow (250kb/sec)

Oct 21, 2014

I mount a BD-RE in Debian Jessie to write about 20GB of data. But the writing speed is terrible slow. I get a Speed of 250kb/sec.

Are there any options to increase the speed of writing? I don't use packet writing and no wodim, no growisofs, nothing. I just mounted the disk and I use mc (Midnight commander) to copy the data.

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Debian Hardware :: SATA Disk Not Visible After 8.1 Installation

Jun 20, 2015

Debian 8.1
Kernel 3.2.0
xfce4

I own a secondary SATA disk I used without problems. In the last days I updated to 8.1 and after that I was not able to read the disk. The fdisk -l command has the output:

Code: Select allDevice     Boot Start       End   Sectors  Size Id Type
/dev/sdc1  *       63 117194174 117194112 55,9G  7 HPFS/NTFS/exFAT

Disk /dev/sdb: 37,3 GiB, 40020664320 bytes, 78165360 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00087e23

The disk is mounted on:
Code: Select all/dev/sdc1 on /media/stefano/MobileSata type fuseblk (rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096,uhelper=udisks2)

When i access to the disk, i always have the error:
Code: Select allstefano@GhilbaDebian:~$ ls -l /media/stefano/MobileSata
ls: impossibile to access to /media/stefano/MobileSata: input/output error

In the dmesg there is no particular message.

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Debian Hardware :: Ath9k Snail Slow Wtih 2.6.38 / Speed It Up?

Apr 17, 2011

Since 2.6.38 ath9k has become slow as a snail. After searching this issue I have found a solution.
Create a file called /etc/modprobe.d/ath9.conf in this file enter thisoptions ath9k nohwcrypt=1Reboot or reload the module and enjoy high speed again.

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Debian :: Internal SATA Disk Slower When Running On Battery?

Feb 5, 2010

I have Etch running in my laptop. I found that if the laptop is only running on battery, the disk seems to performs slower than if I running on a power adapter. How do I possibly check the setting and fix it?

I'm the only user on the system most of the time and I keep it as minimal as possible so it's not other services and programs keeping the disk busy.

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Debian Hardware :: Sdparm Not Stopping SATA Disk In Squeeze

Feb 9, 2011

I recently updated from Lenny to Squeeze. In Lenny I used to spin down my internal SATA backup drive like this:

# sdparm --command=stop /dev/sdb

It worked well in Lenny, but it doesn't work in Squeeze:

XXXX:~>sudo sdparm --command=stop /dev/sdb
/dev/sdb: ATA WDC WD2500AAJS-2 01.0

All I can hear is a click indicating drive head movement but the disk keeps spinning.

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Debian Hardware :: Slow Outgoing Network Speed With RTL8111 / 8168B

Sep 18, 2014

I'm experiencing very slow network speeds in one direction (out) on a clean install of debian.

iperf client running on laptop connecting to server with issue:
Code: Select all$ iperf -c 192.168.10.187 -d
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size:  128 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 192.168.10.187, TCP port 5001
TCP window size:  129 KByte (default)
------------------------------------------------------------
[  5] local 192.168.10.131 port 55340 connected with 192.168.10.187 port 5001
[  6] local 192.168.10.131 port 5001 connected with 192.168.10.187 port 52664
[ ID] Interval       Transfer     Bandwidth
[  5]  0.0-10.0 sec   247 MBytes   207 Mbits/sec
[  6]  0.0-11.5 sec  1.00 MBytes   730 Kbits/sec

I've tried with different cables on the server, no luck. Also note that the laptop gets full speed to speedtest.net as per my internet subscription (75/75 gbit fiber), so the laptop can be ruled out as a problem since it gets more than 75X performance to the internet compared to the local server.

The main purpose of this server is to be a virtualbox host. I've set up one guest system and ran iperf between the host/guest (bridged network). It gives better numbers, still the host -> guest direction is much slower than it should be:

Code: Select allClient connecting to 192.168.10.187, TCP port 5001
TCP window size:  108 KByte (default)
------------------------------------------------------------
[  3] local 192.168.10.163 port 48573 connected with 192.168.10.187 port 5001
[  5] local 192.168.10.163 port 5001 connected with 192.168.10.187 port 48856
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  1.65 GBytes  1.42 Gbits/sec

[CODE]..

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Debian Configuration :: Slow Transfer Speeds On SAMBA Share But Gigabit Speed On SCP

Feb 12, 2016

I'm having a strange problem with data transfers between systems. I have a file server + my desktop. Both are running Debian 8.3. I have a samba share running on the file server and I mount the shares on my desktop on boot via /etc/fstab

When I copy a file using the nautilus from my home folder (on my HDD) on my desktop to the mounted network location, my transfers start out at gigabit speeds 80MB/s-90MB/s for a couple seconds and then drop down to about 8MB/s

But when I terminate the transfer and then use scp to transfer the same file, I get consistent gigabit speed throughout the transfer. I am not sure what is going on.

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Debian :: Slow Read/write On External Storage Devices Connected Via USB

Mar 29, 2010

I am running Lenny. USB storage devices are painfully slow, if the data to be copied is above 4GB it works on transferring for more than half an hour and then comes up with an error dialog(saying something like file size is too big). The problem exists in both read and write.

I did google a bit and here is the output of lsmod | grep hci
ehci_hcd28428 0
uhci_hcd18672 0
usbcore118192 4 usb_storage,ehci_hcd,uhci_hcd

[Code].....

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Debian :: Cannot Rename The Disk Or Write Anything

Apr 1, 2010

I have formatted to EX3 in gparted all went fine, however I cannot rename the disk or write anything to it as access is locked to root Furthermore a file has been created called "lost and found" its locked and 46GB in size - what is this?

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CentOS 5 Hardware :: Limit Sata Speed For A Single Device

Dec 18, 2010

I have an external sata dock for hdd that give me a lot of error till linux decided to lower the speed of it to 1.5 then it start work well

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Debian :: Check If Mainboard Supports SATA-I Or SATA-II?

Jun 1, 2010

My motherboard supports SATA but I do not know which version: SATA-I or SATA-II. I want to buy a SSD so it would be pointless to buy a fast SSD if my motherboard only suports SATA-I

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Debian Configuration :: Extremely Slow Transfer Rate On Flash Disk ?

Jul 12, 2011

Same computer and flash. Two results on different OS:

Write speed under debian: 0.4 MB/s

Write speed under Windows: 6.6 MB/s

From what i've been reading on the net I guess it's something to do with the mount - sync option.

I've notice that there are couple of workarounds but all of them are pretty tedious.

Is there any simple (GUI - one/two clicks) tool that allow to mount/unmount flash disk easily using the correct options?

I'm using Squeeze 6.0.2 (Kernel 2.6.32-5-amd64), gnome 2.30.2

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