Ubuntu :: Hard Disk Working At Half Speed During Boot?

Oct 22, 2010

I've recently updated my ubuntu lucid to maverick (32bit).However I noticed a strange issue at boot. My boot time is increased more than three times(tried to reprofile, but with no improvement) from 24s to 1.23min.After some bootcharting,I noticed that the disk utilization during maverick boot seems to be at 50% for most of the time and also the cpu seems to work at half speed for most of the time...My laptop is an asus m51sn, intel t8300, nvidia geforce 9500m gs, 3gb ram, 500Gb WD scorpio blue hdd.

bootchart for maverick:
bootchart for lucid:

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Ubuntu Servers :: Hard Disk Half Full - System Says No Space Left

Jun 30, 2011

For our workgroup I set up a server which is basically 10.04.2 with kernel 2.6.32-32-server on a SSD and all the data on a RAID 5 consisting of 4 2TB hard disks, thus a maximum of 6TB space for data on the RAID. Having multiple users with different amounts of data from different scientific data source I set up an lvm on top of the RAID

--- Physical volume ---
PV Name /dev/sdb2
VG Name home-data
PV Size 5,45 TiB / not usable 3,00 MiB

[code]...

Here is the problem: The volume Genomes (or /genomes) is half full

sudo df -ah
/dev/mapper/home--data-Genomes
1,9T 850G 920G 49% /genomes

but the system states it as full whenever I try to add more data (tried cp and rsync). There is no quota set to the volume (I have quotas in place for users home folders. These are only for max amount of disk space, not max file number, and I am still able to move/add files elsewhere so there seems to be no interference).

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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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Jun 10, 2011

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Dec 14, 2010

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Jul 7, 2009

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Dec 14, 2010

How do I check my hard disk Revolutions Per Minute (RPM) speed from a Linux shell prompt without opening my server case?

I referenced some other articles. they give only model number, serial number and disk space, but I need Hard disk RPM speed using shell script. any other Java program

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Jun 9, 2010

I have a machine currently running Debian Lenny on which I would like to run Ubuntu for the driver support in its newer kernel. However, I did a test boot from the installation CD and it appears to be running at less than half its rated speed. This is the output from the Debian kernel:

brendand@kant:~$ uname -a
Linux kant 2.6.26-2-amd64 #1 SMP Wed May 12 18:03:14 UTC 2010 x86_64 GNU/Linux
brendand@kant:~$ cat /proc/cpuinfo
processor: 0

[Code].....

Maybe this is some sort of power save bug where the CPU speed is incorrectly scaled back. Has anyone else encountered this problem? Should I report it as a bug, and, if so, how do I do that?

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Mar 9, 2011

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Sep 19, 2011

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I recently switched to Mint from Ubuntu. Now my download speed is significantly slower, to the tune of 45 KB/second. Since the connection runs at normal speed when I connect via an ethernet cable, my guess is that mint doesn't give enough power to the wifi card. Is there any way I can fix that?

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Apr 8, 2009

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Oct 16, 2009

my Fedora 11 system is not starting anylonger. It stops with the message:

Code:

VFS: Can't find ext4 filesystem on dev dm-0

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May 14, 2010

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Sep 26, 2010

This afternoon I finally had the time to run this Ubuntu KK CD and load over my old xp/Jaunty J partition. I had previously run the distro. through the CD, without harming my old partition. On doing so the system consistently reported my Toshiba ATA 120 gig hard disk had multiple bad sectors and was failing. As a true end user (who mucks only when necessary with the CLI) I just figured writing over the partition would end the failure. To be sure I ran Memtest8.66 v2.11 from the LiveCD; everything checked out fine. So I installed KK.

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I've checked on line for boot issues, and the forum too, but so far haven't seen an issue booting from the HDD, especially when the distro. is already loaded. What am I missing here, and how do I install it from a live CD environment?

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Mar 27, 2011

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Jun 21, 2011

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Code:
$ sudo hdparm -I /dev/sdb
[sudo] password for brian:

[code]...

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Aug 21, 2010

I installed an OS on the second hard-disk/partition3 (/dev/sdb3; OS was FreeBSD). Added the entry and when i boot: nothing. I choose the OS from grub's menu, the list of choices vanishes, the background image stays, and there it hangs. It hangs until i hit: ctrl+alt+backspace. I have thought: to hell with it, and installed Debian/Lenny. Same problem (OH!).

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I made two threads about it, in case they contain useful info, here they are:
http://www.linuxquestions.org/questions ... sd-827059/
http://forums.freebsd.org/showthread.php?t=17021

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Mar 30, 2010

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Code:
title Install Ubuntu
kernel (hd0,0)/install-ubuntu/vmlinuz

[code]...

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May 29, 2011

I'd like to move my existing Ubuntu installation from my hard disk (/dev/sda1) to a USB stick. How do I copy the data from HD to USB? dd is obviously not the right option since the HD is 320GB and the USB stick only 16GB. However, only 3.5GB are used so this makes perfect sense.And it would make my HTPC even more silent |-)

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Apr 24, 2011

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May 17, 2010

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Aug 17, 2010

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Jul 28, 2010

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Aug 9, 2011

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