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  • Why is USB-sticks so much slower than Solid State Drives?

    - by Jonas
    From what I understand, USB flash memory and Solid State Drives are based on similar technologies, NAND flash memory. But USB-sticks is usually quite slow with a read and write speed of 5-10MB per second while Solid State Drives usually is very fast, usually 100-570MB per second. Why are Solid State Drives so much faster than USB-sticks? And why isn't USB-sticks faster than 5-10MB per second? Is it simply that SSD-drives uses parallel access to the NAND flash memory or are there other reasons?

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  • Is ECC mandatory in SSD technology?

    - by Alexander Shcheblikin
    While shopping for an SSD I have noticed that some manufacturers promote their "Pro" models as the ones sporting ECC data protection. Those manufacturers do not mention ECC in their budget models descriptions. However, Wikipedia article on flash memory states that "NAND relies on ECC to compensate for bits that may spontaneously fail during normal device operation." So the question is does any SSD device use ECC behind the scenes for its normal operation and is that ECC "feature" just a marketing ploy?

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  • Cannot boot from Yumi multiboot USB stick

    - by Amator
    I've just created a multiboot USB stick using Yumi. I tried to start my notebook (Asus K70IO) using it, but all I see is just a black screen with blinking underscore even after waiting for minutes. If during this time I remove the USB stick I get the message: "Operating system load error". How do I properly load my Yumi USB stick and use it? I've tried formatting it using Yumi's checkbox to format the stick in FAT32 too, but it didn't help. Now I tried to use Sardu 2.0.5 and met same problem: black screen and blinkin underscore, if I remove stick I see "Operating system load error" and my OS starts to boot. At the same time if I create bootable USB stick from ISO using UltraISO it boots smoothly.

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  • Autounmounting USB keys with FAT filesystem on Linux (RHEL5)

    - by niXar
    For security reasons, I have two workstations i front of me, and I can only transfer data between them through a USB key. As you can imagine, it can get quickly tiresome, but the most annoying is having to unmount the things before removing them. Not umounting them results in missing files most of the time, even if I remove them a while after having last written to them. Now, since they're only used for transferring smallish files, and each are basically written once and read once, I don't need the fancy pansy caching infrastructure that makes clean unmounting a necessary step. And since the data is always a copy of something I have at hand, I don't care if the filesystem croaks from time to time. But anyway the system doesn't need to force that on me, it could simply make sure everything is committed with a second, and works synchronously. Then when I remove the key, nothing is lost. Is there a way to do this? I would appreciate any other tips on handling this situation. Edit: it appears the situation has changed between RHEL5 and Fedora up to F11 on one hand, and F12 on the other. The latter use DeviceKit-disk, and I haven't quite figured out how to do this. The method provided below in gconf does not work anymore.

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  • How do I make a USB stick from which to install different OS's?

    - by Hanno Fietz
    Recently, I have made a number of USB sticks to install OS's (several Linux flavors, BSD, Windows) from, on machines that didn't have CD drives. Now, I would prefer to not overwrite the install USB sticks all the time, since it's handy to have them, but neither do I want to pile up USB sticks that I only need every 6 months. It would be great to have a bootable USB stick that fires up some minimal system, lets you choose an ISO image and then reboots from there. How would I go about this? Do I use some minimal Linux? Is there some kind of modified / specialized boot loader? Can I set up GRUB to do this? Should I use virtualization?

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  • Is Software Raid1 Using mdadm with a Local Hard Disk and GNDB Possible?

    - by Travis
    I have multiple webservers which use many small files to created dynamic web pages. Caching the web pages isn't an option. The webserver also performs writes so I need a synchronous filesystem. I'm looking to maximise performance as it's my understanding that small files is the weakness (to varying degreess) of a cluster filesystem over ethernet. Currently I'm using Centos 5.5, 64 bit. Since it's only about 300MB of data, I'm looking at mdadm using RAID-1 with the GNBD and a local hard disk using the "--write-mostly" option so the reads are done using the local hard disk. Is this possible? If so, is there any advantage to making it a tmpfs disk instead of a local hard disk? Or will the files on the local hard disk just get cached in RAM anyway so I won't see a performance gain by using tmpfs, assuming there's enough RAM available?

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  • install Ubuntu and remove Windows 7

    - by dani
    I'm using Windows 7 on my laptop (2GB RAM, 250 GB HDD). I want to install Ubuntu and remove Windows 7. I have Partitioned my laptop into 2 partitions: , C Drive - 105 GB and D Drive - 145 GB. I want to install Ubuntu on C drive all my data in D drive, no backup I have already selected the "Try something else option " /dev/sdb /dev/sdb1 ntfs 104855 MB unknown C drive /dev/sdb5 ntfs 145192 MB unknown D drive I need help using the "Try Something Else" Option My course of action: laptop power on bootubuntu nextsomething elsepartition.

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  • European alternatives to Dropbox?

    - by torbengb
    Dropbox is positively brilliant, but the data center is probably in the US somewhere. Since I'm in Europe, there's plenty of lag and a poor upload rate. Are there any similar services using data centers in Europe? I'm looking for a free plan (cirka 2GB), so sites like Amazon S3 aren't good answers.

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  • How to find out which app locks a given USB storage device?

    - by Dimitri C.
    I'd like to unplug my USB mass storage device, but I get the following error message from Windows: Windows can't stop your 'XYZ' device because it is in use. Close any programs or windows that might be using the device, and then try again later. How can I find out which application locks the device, so I can safely unplug it without having to close all running applications first? Note: I'm working on a Windows Vista system.

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  • frequent errors with subversion repository on fat32 on USB memory stick

    - by sal
    I keep a copy of a Subversion Repository on a USB memory stick that is formatted with FAT32. I am using TortoiseSVN on XP and command line svn 1.6.x on Ubuntu and OSX with this memory stick. I notice that I need to do an svn cleanup just about every time or updates and commits will not work. I routinely have errors with .lock and *.svn/text-base/** files getting corrupted. Errors tend to be parameter is incorrect or lock file can not be read Sometimes svn cleanup works and sometimes chflags -R nouchg * Is there anything I can do to prevent this?

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  • Analyse frequencies of date ranges in Google Spreadsheet

    - by wnstnsmth
    I have a Google Spreadsheet where I would like to compute occurrences of date ranges. As you can see in my sheet, there is a column date_utc+1 which contains almost random date data. What I would like to do is put the date values into bins of 6 hours each, i.e., 12/5/2012 23:57:04 until 12/6/2012 0:03:17 would be in the first bin, 12/6/2012 11:20:53 until 12/6/2012 17:17:07 in the second bin, and so forth. Then, I would like to count the occurrence of those bins, such as bin_from bin_to freq ----------------------------------------------- 12/5/2012 23:57:04 12/6/2012 0:03:17 2 12/6/2012 11:20:53 12/6/2012 17:17:07 19 ... ... ... Hope it is clear what I mean. Partial hints are very welcome as well since I am pretty new to spreadsheeting.

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  • What's the maximum size Windows 7 allows for ReadyBoost?

    - by ymasood
    I read somewhere the Windows 7 had removed the limit on ReadyBoost from 4GB and now allows an unlimited number of GBs. I would like to reconfirm this as a fact. At present, my Windows 7 RC 7100 allows me a maximum of 4GB on one of my 8GB flash drives (though I've tried to connect two at a time and use 4GB on one and 2GB on another). Thanks!

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  • How do I record sound from my CD/DVD player without other system sounds in the mix?

    - by Software Monkey
    Using GoldWave I can record via the "Stereo Mix" channel, but I get no sound on the "CD" channel. Of course, using the stereo mix also mixes in all system sounds, including beeps, etc. I have the analog out on the DVD player connected to the CD-IN connector on the MoBo. I can hear CDs and DVDs playing just fine through my speakers - is this because the CD is also IDE data connection in to deliver the sound to the sound card, then? I specifically want to record a DVD; I can easily rip a CD using GoldWave's built-in ripper. Is there anything I have forgotten or have to enable? Or is it likely I have a damaged cable? My system is an MSI mobo and is running Windows XP SP3.

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  • USB sticks optimized for OS booting and virus removal [closed]

    - by Rupert
    I'm looking to buy some usb sticks which will mainly be used in tech support for the purposes of removing viruses and booting up various OS's. Therefore, I am looking for the following features: Write protected switch (so that they may be safely plugged in to potentially infected machines) As fast as possible (so that loading, for example, a windows recovery, doesn't take forever) At least 4GB in size Any other features that might be useful for the above purpose Price is no object but, of course, the cheaper the better.

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  • Is it possible to copy recordings off of a DVR box hard drive?

    - by bdr9
    My cable TV company gives me a Cisco Explorer 8640HDC DVR box that can record shows from TV. I know that it contains a hard drive to save the shows on. What format and file system are used to store the videos on the hard drive? I have looked at the documentation for this DVR box and there is no technical information about the manner in which recordings are stored. Is it possible to connect the hard drive to a computer and extract the recordings from it?

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  • Pendrive not working on USB port - USB2 Enhanced Host Controller - 27CC

    - by user1664417
    I have a situation here, is kind of weird. Situation as below: If i enable the 'Intel(R) 82801G (ICH7 Family) USB2 Enhanced Host Controller - 27CC' , then my pc will not be able to read any USB stick/pendrive, but usb port work fine with keyboard and mouse. If I disable the device driver, then all kind of pendrive can be read. Below is What i have done : 1) try the same pendrive on other pc, it work like charm. 2) try others pendrive on issue pc, same problem, but it work fine in others pc. 3) try all the port, including the port that connected to mouse n keyboard. 4) update the driver version. 5) restore default setting of usb in bios Please help to solve these issue if anyone experience it before. Many thanks.. :

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  • Tool to test USB sticks?

    - by Tony_Henrich
    Some of the files I copy to a USB stick seems to be corrupted? Maybe the stick is bad but I haven't used it much and want to know for sure. Is there a Windows utility to test the stick? Mark bad areas as bad so the file system doesn't save to them? I format before I copy but I still get corrupted files? Does chkdsk work on USB sticks reliably?

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  • Why does my USB stick not show up in Windows Vista?

    - by Kjensen
    Just reinstalled a Lenovo laptop with Vista. Two separate USB sticks, that work fine on another computer, will not show up on this Vista computer. USB ports work fine for other stuff. USB sticks worked before I reinstalled the computer. After looking around, I tried going into Disk management, to see if they appear there - they don't. Is there some sort of service, that might be disabled, not allowing removable drives to mount? Or what else can be wrong?

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  • Dead-simple USB-based Windows partition cloner?

    - by OverTheRainbow
    Clonezilla is a fine open-source tool, but it requires going through several screens. Since I need to save/restore the same Windows partition, I was wondering if someone knew of a tool (open-source or not) that is easier to use and boots off a USB keydrive. Ideally, it'll save the two commands to save/restore a partition, so I just need to boot the host from the USB key, choose the command, and it'll take care of business. Are there solutions that look like this? Thank you. Edit: Here's one among other articles that shows how to tell CZ to run a script to avoid the multiple screens.

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