Ubuntu :: Solid State Disk As Cache For Regular Hard Drives?
Nov 16, 2010
60 gigabyte SSDs are down around US$100.
It seems like the optimal use would be as a cache for the regular hard drives in my computer. Eliminating the need for a fast hard drive, so I can just use a slow 2TB (~US$100) drive with a SSD cache.
Is there a good way to do this yet?
It seems like it would be nice to be able to exclude some files from caching, for things like bittorrent.
Reviews of some SSDs: [URL]
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Aug 21, 2010
I was looking into getting some solid state drives for the 1st time. I have always used Seagate traditional SATA drives for my home systems but I think I would like to try something new and that has much better performance. Do you guys know if I will see any performance gains and or issues using SSD on Linux? I run Arch and Debian Linux in general...
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Apr 6, 2010
If you have a hard disk image (including partition table, multiple partitions,...), is it possible to let Linux treat it as a regular hard disk?
By "regular hard disk" I mean I would like to have the image show up as, for instance, /dev/hdx and its partitions as /dev/hdx1,...
(I know I can mount one of the partitions in the image using "mount -o loop,offset=x ..." but I don't really like this option.)
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Jun 12, 2010
Had a laptop with a Hardy install - my two year old knocked it on the floor and after that it no longer recognized the drive, and I could hear the hard drive read head hit the platter when it tried to read it.
I bought a new Kingston 128GB solid state drive to replace my old 40GB drive - figure it will be more robust.
I tried installing Lucid, and it stopped after partitioning the drive and was unable to format it. I attempted to use my old Hardy install disks, and had the same issue. I spent time with Kingston tech support, they had me try a few things, then RMA'd me a new drive. New drive still had the same error.
I figured something else must've broke and let it be for a while. Today, just for the heck of it, I attempted to install XP on it. Flawless. So, it's not a hardware issue.
Any known issues with the Ubuntu installer and Laptop SATA-2 Solid State Drives? (I'll put more details in a later post if needed, don't have them at this very moment)
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Feb 25, 2010
i am currently trying to do software raid 1 on a running ubuntu 9.10 system with mdadm. I might have done something wrong and im trying to go back from the beginning. Does anyone know how to remove all the raid info from a harddisk and get it back to its original state.
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May 14, 2011
What should be done to completely wipe clean a solid state drive (before selling a computer)? What should be done for a regular drive, and what considerations apply to a SSD?
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May 26, 2010
I'm having a particular problem trying to partition a solid state drive on a Dell Mini 9; I'd like to install Ubuntu Netbook on the computer. The machine came with MS Windows XP on it. When I try to use the automated installer, it fails and quits at the partitioning stage. I have tried both fdisk and parted but both of these also fail and quit with errors when they try to write to the disk. I've also tried using Fedora and Knoppix to install and they both fail as well. I did check in the BIOS that the drive, supervisor and user passwords are clear.
Some technical bits that fdisk chucks out;
[ 1913.488878] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[ 1913:494318] ata1.00: failed command: WRITE SECTOR(S)
[ 1913:500232] ata1.00: cmd 30/00:02:3f:00:00/00:00:00:00:00/e0 tag 0 pio 1024 out
res 51/05:02:3f:00:00/00:00:00:00:00/e0 Emask 0x1 (device error)
[ 1913.511226] ata1.00: status: { DRDY ERR }
[ 1913.517018] ata1.00: error: { ABRT }
can get access to partition the drive or diagnostics to tell what is the problem with the drive?
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Jun 25, 2010
I'd like to build a compact x86 host running off a CompactFlash or some equivalent solid-state memory instead of from a SATA disk, to reduce the risk of failure once they're deployed at customers' premises. Those are SOHO users, so performance is not an issue, but stability is (The less I have to drive to replace faulty hardware and restore data, the better.)
Do you know if the usual suspects (Ubuntu, CentOS, Gentoo, etc.) can easily be made to run from solid-state memory, and if yes, is there some good documentation to customize them thusly?
I assume it's just a matter of tweaking /etc/fstab, but it could be more involved.
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Jul 26, 2009
With the new Intel G2 SSDs coming out, I'm thinking about upgrading my hard drive. However, there seems to be an extra level of software support needed for SSD drives. From what I have read there can be performance degradation over time and other issues. Does anyone know how well SSD drives are supported in Linux and also if there is support for the TRIM command or if it is planned?
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Oct 22, 2010
As i understand, after autofs unmounts disk (network or otherwise) it keeps spinning. It costs energy, so i wonder is there any way to put hard disk to idle state after autofs timeout kicks in?
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Dec 29, 2010
I'm not a stranger to Ubuntu Linux and I was using it for a couple of months with no problems until last week when I turned my computer on and it would go no further than the boot screen and it said 'Error- Insert System Disk'. So I inserted the system disk (Ubuntu Linux 10.something) and after waiting 10 minutes for it to load up it said 'Installation failed, desktop session will now be run and you can try installing again'. So I tried installing whilst on a desktop session and I eventually got to step 4 of 8 and it lets me go no further. This is what step 4 of 8 is:http://oi54.tinypic.com/mx2g79.jpg
And so I cant choose any disks or partitions and so it wont let me go any further. How do I create one? I'm currently running on desktop sessions and they take forever to load up and I cant watch videos or anything because there is no flash. By the way please try and explain to me really simply because I am quite dopey and I wont be able to understand posh complicated computer words.
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Aug 16, 2010
I just bought a USB hard disk and when I plug it in it gets mounted as owner root and group root. I tried writing a udev rule for it based on the following guide:Nothing seems to work, it always mounts as root. Slackware 13.1, KDE, Dell Optiplex GX280, Western Digital Passport USB 320 gig drive.I am a member of the plugdev group, so it seems to me a rule should not even be necessary.
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May 26, 2011
The problem is every forum I read pretty much ends up with someone suggesting DD, everyone agreeing and the threads dead-end. This is not a good solution for real world large scale usage which is what I'm trying to do. At least it doesn't appear to be unless there is some switch I have misinterpreted when invoking the command. The problem I have with it is it's super bloated and god awful slow. It tries to write out the entire partition or set of partitions (based on the choice I have made) reguardless of if any of the space had been empty, and lets say the partition I copied from was 80 GB and I copy it to a 160 GB disk/partition... I am left with an 80 GB partition and 80 GB unused space and a need to use another tool such as Gparted to resize the newly imaged disk accordingly.
Right now what I use is Norton Ghost and it can do the job I need in only a couple minutes instead of a couple hours and it sizes the partition to max size all at once. I do not want to use this program tho... The fact is in order to make ghost run at a usable speed I have to use it's Windows and not its DOS version which leaves me using something like BartPE and... that's worse than using Windows ME. Surely someone out there has noticed this is a problem and developed a better program that can at least run on par with Ghost.
why I was hoping for a Linux solution it's because I would like to use a "one stop shop" disk, so to speak, where I can boot into a small linux distro such as Puppy and have a full suite at my disposal rather than booting with one disk, wiping, rebooting with another disk, ghosting then testing everything. I suppose if anyone knows of a distro that can already do all that including a good ghost alternative already packaged I would love that.
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Jun 11, 2010
I use ubuntu on about 3 machines, have installed it many times, and run it virtually with software and been using Ubuntu and many other distros for about 8 months now. I am still pretty much a noob and when it comes to CLI I have no clue and need it all spelled out for me. So I'll cut to the problem. My problem is that about every 10-15 minutes my netbook (Samsung N130 1.6ghz atom 2GB 800mhz RAM 160GB HDD and 128mb GMA GPU). All of my other ubuntu or any other linux distro for that matter do not have this problem I am about to explain.
So it gives me a false signal that the HDD is in use. Like an example... I'll be browsing a web page and all of a sudden it stops... I'm not running anything else or downloading anything internet is there and just stops. I can move the mouse and when I hover over objects it highlights but a click is unresponsive. And I have noticed everytime it does this it lasts about 20 seconds and the HDD indicator light stays a solid color but when I listen the HDD is it's normal sound (no ripping of data or anything).
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Apr 8, 2009
after installing Ubuntu on one WD 500 GB hard disk and after making mistake and pasting wrong code into Terminal:my OTHER WD 500 GB hard disk that was also in the system (I guess it was "hd1") - died.The problem must be, I guess, I typed wrong code: "hd1,1" instead of "hd0,0".)500 GB (NTFS) of data was on that other (non-Ubuntu) hard disk, and now I can not access it anymore. While booting, system gives "Hard Disk Error" warning and stops.One again: I installed Ubuntu od one hard disk and at the end of instalation I pasted wrong code for GRUB, giving address of another hard disk. Now that other hard disk has error and will not work
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Sep 23, 2010
I want to copy hard disk have ubuntu 10.04 and ext4 to 1000 hard disk for new 1000
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Jul 7, 2009
I have a sata 320 gb with mandriva linux 2009.1 on it.And it is what curently atached to my cpu. It is shown as 'sda' in the partition table.I also have another 40gb hard disk with windows xp installed on it.It is shown as 'hda' in the partition table . Now what i want to do is attach this 40gb hard disk to my pc and configure grub on my 320gb hard disk('sda') so as to boot windows xp(which is residing on the second hard disk,'hda')Can anyone tell me if what im doing is feasible or not? If it is feasible,can anyone suggest me how to get it working. I know i just need to add 2-3 lines to my grub.conf, but dont know what exactly i need to write.
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May 14, 2010
I had a dual boot (windows 7 + debian), both of them installed in my internal hard disk, with the GRUB in it. I have recently installed a second linux distro (mint), but I put it in an external hard disk. Now the GRUB allows me to boot any of the three operating systems, but I need the external disk to do it. It seems that after the mint installation the GRUB is now working from the external disk (if the external disk is not connected, the machine does not boot.) �Is there a way to change the location of the GRUB, to the internal hard disk of my laptop?
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Mar 26, 2011
I am building a home server that will host a multitude of files; from mp3s to ebooks to FEA software and files. I don't know if RAID is the right thing for me. This server will have all the files that I have accumulated over the years and if the drive fails than I will be S.O.L. I have seen discussions where someone has RAID 1 setup but they don't have their drives internally (to the case), they bought 2 separate external hard drives with eSata to minimize an electrical failure to the drives. (I guess this is a good idea)I have also read about having one drive then using a second to rsync data every week. I planned on purchasing 2 enterprise hard drives of 500 MB to 1 GB but I don't have any experience with how I should handle my data
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Jun 21, 2011
I was using Terminal and browsing a directory in my home folder. My "home" directory is located on "/dev/sdb1". When in Terminal I typed "ls" in one of my directories and the output was garbage. The output didn't show the files in the directory. I think it said something like, "input/output error". Unfortunately, I didn't write the exact error down. Instead I rebooted.The hard disk with the problem is:
Code:
$ sudo hdparm -I /dev/sdb
[sudo] password for brian:
[code]...
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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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May 23, 2010
I have two computer systems at home (a laptop and a pc), one with ubuntu 9.10 and the other being windows 7. Since i recently discovered how awesome counter-strike:source runs on the latest edition of Wine, I no longer need Windows 7 on my system.
The question is, I have partitioned my laptop at least 5 times the last 6 months, and I want to find out if my hard drive could cope with repartitioning once more. Could you guys please give me the name of a tool for Windows to check the state of my hard drive?
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Jul 5, 2011
I have Fedora 14 installed on my main internal drive. I have one Fedora 14 and one Fedora 15 installed on two separate USB drives.When I boot into any of these drives, I can't access any of the other hard drives from the other drivesll I can, but just the boot partitions.Is there any way of mounting the other partitions so I can access the information?---------- Post added at 12:42 PM ---------- Previous post was at 09:34 AM ----------I guess even an explanation on why I can't view them would be good too.
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Nov 20, 2010
My problem is, firefox (3.6.12 and 4.0 beta 7) freezes for seconds/minutes and enters in disk sleep state (the usb-storage process too). My system is an EeePC 701, openSUSE 11.3 x86, with the /home and swap partitions on a SD card.
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Aug 23, 2010
I have a SATA drive that worked fine. Then I installed two more hard drives into my system. When these hard drives are installed, if I try to access the SATA drive in Linux, it will start lightly clicking and then the drive will become unavailable. If I power on the machine without the other two hard drives then it works fine. What could be causing this to happen? I don't think it's heat because the two hard drives are far away from the SATA drive.
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Jun 30, 2010
mount from the old hdd to the new hdd i mean (Hard disk)
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Jan 6, 2011
Given a PC with several hard drives:
Is it possible to use one fast disk as a giant file cache?
I.e. automatically copying frequently accessed data to that one disk, and transparently redirecting reads and writes to that disk, so that other drives would only have be accessed occassionally.
(writes would have to be forwarded to the other disks after a while of course)
Advantages:
The other drives could be powered down most of the time; reducing power, heat, noise speed of the other drives would not matter much. cache disk could be solid state.
How can I set such a system up?
What OS supports these options? Is this possible at all using Windows or Linux?
Example:
There are 3 disks with 1 Tb each. most of the files are only accessed very rarely, but about 5% of each disk is used frequently.
Which files are used frequently may change over time.
A solid state disk with 150GB should cache the currently frequently accessed files, so that access time is faster and the drives can be put into power saving mode.
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Dec 26, 2010
Using KInfoCenter | Memory module it shows my 2GB of ram. Approx. 14% is used for Application Data and Disk Cache has been anywhere from 29-35%...leaving approx 1GB free. Can this 'Disk Cache" be reduced leaving more memory free or is this determined by the OS?
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Oct 29, 2009
How can I get a LUKS encrypted partition on an external USB device automounted with r/w access for non-privileged users?
Background:
I just reformatted an external USB device with ext4. The only partition is LUKS encrypted. Now, when I plug the device to my computer, KDE notifies me and asks me to enter the LUKS passphrase. Then it mounts the device. Little snag here: Non-privileged users have read-only access.
My user is a member of group plugdev, but not of group disk, as this was discouraged several times, e. g. by Robby Workman. With non-encrypted disks regular users have read/write access, or can change the filemodes accordingly, as far as I recall (currently I have no more non-encrypted disks left to verify it...)
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Sep 1, 2009
Copy of IBM Server hard disk data to Another USB External Hard disk?
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