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• Is a larger hard drive with the same cache, rpm, and bus type faster?

  - by Joel Coehoorn

  I recently heard that, all else being equal, larger hard are faster than smaller. It has to do with more bits passing under the read head as the drive spins - since a large drive packs the bits more tightly, the same amount of spin/time presents more data to the read head. I had not heard this before, and was inclined to believe the the read heads expected bits at a specific rate and would instead stagger data, so that the two drives would be the same speed. I now find myself looking at purchasing one of two computer models for the school where I work. One model has an 80GB drive, the other a 400GB (for ~$13 more). The size of the drive is immaterial, since users will keep their files on a file server where they can be backed up. But if the 400GB drive will really deliver a performance boost to the hard drive, the extra money is probably worth it. Thoughts?

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• Adding Extra Hard Drives Debian Fdisk

  - by Belgin Fish

  well I just got a new server and it's a little different than what I'm use to, when I run cfdisk I get WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sda: 3000.6 GB, 3000592982016 bytes 255 heads, 63 sectors/track, 364801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 1 267350 2147483647+ ee GPT Partition 1 does not start on physical sector boundary. WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdb: 3000.6 GB, 3000592982016 bytes 255 heads, 63 sectors/track, 364801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdb1 1 267350 2147483647+ ee GPT Partition 1 does not start on physical sector boundary. WARNING: GPT (GUID Partition Table) detected on '/dev/sdc'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdc: 3000.6 GB, 3000592982016 bytes 255 heads, 63 sectors/track, 364801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdc1 1 267350 2147483647+ ee GPT Partition 1 does not start on physical sector boundary. WARNING: GPT (GUID Partition Table) detected on '/dev/sdd'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdd: 3000.6 GB, 3000592982016 bytes 255 heads, 63 sectors/track, 364801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdd1 1 267350 2147483647+ ee GPT Partition 1 does not start on physical sector boundary. WARNING: GPT (GUID Partition Table) detected on '/dev/sdf'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdf: 3000.6 GB, 3000592982016 bytes 255 heads, 63 sectors/track, 364801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdf1 1 267350 2147483647+ ee GPT Partition 1 does not start on physical sector boundary. WARNING: GPT (GUID Partition Table) detected on '/dev/sde'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sde: 3000.6 GB, 3000592982016 bytes 255 heads, 63 sectors/track, 364801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sde1 1 267350 2147483647+ ee GPT Partition 1 does not start on physical sector boundary. Usually it tells me which ones arn't partitioned and stuff, and I only have 6 drives in my server and there's 6 showing up here so I'm only assuming the first ones already mounted and formatted correctly? I'm not really sure if anyone would help me out here. Basically I just want to format and mount these drives :)

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• How do I install Windows XP from an external hard drive?

  - by Plasmer

  I'm trying to install Windows XP Media Center edition by copying the install disc image to an external hard drive and making it bootable. Has anyone had success getting this to work on systems that can't boot from dvds/floppies? I'm basically working from this guide: http://www.dl4all.com/other/21495-install-windows-xp-from-usb.html Update - 2/15/10 I used WinToFlash on my laptop to format my usb hard drive from my install dvd (Windows XP Media Center Version 2005 with Update Rollup 2 from Dell) and selected "boot from usb device" at the boot selection menu and the windows installer started up. However, an error message came up saying that: "A problem has been detected and windows has been shut down to prevent damage to your computer." Originally on my desktop machine, I had 1 150Gb SATA drive, and 2 150 Gb SATA drives striped together using RAID. From the hard drive diagnostics, it appears the windows install on one of the RAIDed disks lost a block and this has been preventing me from booting up. I replaced the standalone drive with a new 1Tb SATA drive and disconnected the other hard drives. Could the message be indicating a virus is on the unformatted drive? or the usb hard drive? Update 2 - 2/15/10 The external hard drive didn't find any viruses when scanned. I tried installing Vista Home Premium 64bit SP1 using WinToFlash and that installed successfully onto the new 1Tb drive. WinToFlash was really easy to use and helped a lot, thanks!

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• How to see whats taking up space on your hard drive

  - by sam

  Im thinking of switching to one of the macbook pro retinas with a 256gb ssd, im making the move from a 512gb hd, which at the moment is split into a 60bg windows partition (which i dont think im going to have on my new machine) and a 440gb main partition of the main partition ive got 140gb free. So all in if i disregard the 60gb windows part ive got about 200gb free so im using 300gb, which is still a bit to much, ive had this machine 4/5 yrs so its likely to be clogged with files that i no longer need, is there a tool that i can use to view my current hd and see whats taking up the most room, so i can begin to see where i can cut down ? just for a bit of background my current machine runs osx.

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• SEAGATE Barracuda 7200.11 HDD not running

  - by Dane411

  After a huge research, I'm stuck at the beggining of getting my HDD data back. Whats happening to me is that in the moment when I plug the power wire to my external 1TB SEAGATE Barracuda 7200.11 ST31000333AS HDD Fw LC15, it makes the sound like it's spinning to almost full speed and then shuts down and spins up again, and so on. It's well known that those HDDs have a bad firmware that someday randomly fails. There are like 2 main problems identified, BSY (busy) state, and LBA0 error. Last time I connected it to power nothing happened, it didnt try to start at all, is it that so called bricked state? I guess my HDDs error is the first one, but I dont really know if what I described is that BSY state or not, neither I know how to check it. How could I know it? Thank you so much!

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• Disable "Turn off hard disk after" in windows 7

  - by Andreas Bonini

  How can I disable this feature? In the power options apparently I can only choose the minutes and I don't see a "Off" option. If I set it to 0 minutes, it sets itself to 1. For now I set it to 20000000 minutes, but a real solution would be nice.

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• Ubuntu 12.04 doesn't detect hard disk partitions

  - by m0skit0

  I just installed Ubuntu 12.04 32-bit on an ASUS Laptop and wanted to install it in another one, the ASUS A55V. After booting the laptop and setting up Windows 7 (I unfortunately cannot wipe out Windows), and creating one extra partition to install Ubuntu there, when I reboot from USB and launch Ubuntu installation, it doesn't recognize any partition on /dev/sda, but shows the whole disk as unpartitioned. I guess this is due to UEFI, but I don't know how I can make Ubuntu see the partitions created by Windows. Or any workaround for this to be able to install Ubuntu on /dev/sda. Thanks in advance

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• One hard drive missing after converting from ide to ahci

  - by user700859

  I have two 500GB SATA HDD in my desktop running XP. After converting from IDE to AHCI, the HDD I use to store data can no longer be accessed from XP. It shows only the first partition as 150GB, and data type is listed as RAW. However, if I boot into a live linux environment or if I pull that HDD out and connect it using USB, I can still get to all my files again. So I completely formatted the HDD into one single partition. But XP still does not recognize it. It still shows the disk as the 150GB partition and data type is still RAW. What's going on and how do I fix this? Thanks in advance.

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• Replace Hard Drive in Samsung NP900X1A - Need Disassembly Help Please

  - by xedgex

  Need to clone and restore existing 64GB HDD onto a 256GB HDD, can't manage to gain access to the internals of this laptop. I checked with Samsung, they do not make manuals available nor will they help over the phone as to how to remove the bottom cover of this Samsung NP900X1A Laptop. They did offer to sell me a manual BUT they are out of stock for another 10-15 days. I saw the screws under the 4 rubber feet and 4 rubber grommets, all removed but the cover is still on. Does anyone know if there are more screws to take off here? Also, I assume this replacement HDD will work (facto

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• OCZ's Z-Drive and Z-Drive R2

  - by bytecode-ninja

  Has anybody had the chance to use either one of Z-Drive or Z-Drive R2? How do they perform? How fast can they boot Windows? How faster can the compile a big C/C++ or Java based project?

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• Repartition hard drive using Mac OS X, keep existing data

  - by Jonny

  I got a 1 TB disk a year or so ago and loaded it with some hundred of GB of data. I somehow neglected to check the file system, which turns out to be FAT-32 and thus too small for files bigger than 4 GB. So now I want to change it, without deleting the data. I thought I'd just make a new partition in the so far unused space. Then with the new partition, copy/move the data into the new partition, and then delete the old FAT-32 partition, and make the new partition bigger again... or just make a few more partitions. The critical step here is, can I make that new partition without ruining the data? The data should be fairly sequentially added to the start of the disk, but what do I know... so that's why I'm asking. Can I safely use Disk Utility for this? Any recommended file system?

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• spontaneous hard disk password

  - by sc

  I had an HP proliant server go down recently. All of the sudden the sas controller (e200i) would not see any of the physical disks. New disks were detected just fine. I thought it was odd that all 6 disks would go down at one time so sent them to a data recovery firm to find out what happened. I'm being told that, somehow, all of the disks were spontaneously password protected. These are Hitachi 2.5" drives and I guess this is something of a known issue. The company has worked for a while to try and recover them, with no luck. Has anyone had experience with this? Any recommendations for how to recover the drives or a company that might have the expertise to do so?

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• Hard Drive Won't Boot After OS Install

  - by Chris

  This is my step by step process on a Dell Inspiron 6000 with a brand new 320 HD: Turn on Laptop Insert Xubuntu 9.1 disc Boot to CD-rom After boot has finished, I install and instance of Xubuntu on the machine After install (without any errors), I reboot the the machine On reboot, the BIOS claims to be unable to read from device What could this be? (Feel free to ask for more information to perform a proper diagnosis)

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• Stop Windows 7 from accessing or writing to hard drive unless "told" to by me? (More info inside...)

  - by Jeff

  A confusing question, perhaps, but bear with me. I have two internal HDDs set up in a RAID0 array which I use as mass storage. I access the drive very infrequently (once a day at most) and so I have set up Windows 7's power options to turn off idle disks after only 1 minute. This is fine, and the disks are turned off most of the time. However, I notice that Windows sometimes spins up the drives when I really, really don't want or need it to. This causes a 30 second delay as both drives spin up and lock up my system. Some examples of when this happens: 1) When I'm installing something using Windows Installer or Installshield; it seems to me as if they're using the drive with most available free space as the installer cache location... so my big RAID drive has to spin up! Most annoying. 2) Apparently, when I open a Java-based program which resides on my system drive and has nothing to do with my RAID drive! 3) At boot-up and shut-down time. At shutdown the drive spin up only for the computer to immediately shut down! Incredibly frustrating! I've already tried changing the letter of the drive, and at some points have removed the drive letter entirely, which solves the first two issues above. So my question (FINALLY!) is this: is there any way I can mark this drive as being for "storage only", so Windows basically does not see it at all until I actually invoke it somehow? Or is there any way I could set it up so that only specific programs have write access to it? For example, download managers, TeraCopy, etc. etc.? Basically I want it to be a "ghost drive" until I'm ready to use it and to stop Windows from spinning it up all the damn time! Thank you. :)

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• How to automatically take daily HDD backup?

  - by user13107

  I think my HDD might have crashed. I don't want to lose data if this happens again. I have dual boot Windows/Ubuntu system. What is the best way to backup data and other software settings in Ubuntu? I don't care much about Windows partition, important stuff is in Ubuntu. I have 1 Tb external HDD (laptop HDD is of 500 gb total). One way would be to run rsync every day (or via cronjob) to backup everything to external HDD. What might be better ways of achieving this (backup)? Also are instant backup software recommended? Are there any disadvantages of instant backup as opposed to daily rsync?

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• Hard Disk recovery

  - by Shaihi

  I have 3 disks of the same type model and year of production. All the disks were used part of a generic solution of an IBM server solution. My problem is that all 3 disks suffered the same malfunction at the same exact time and are now dis-functional. I went to two different expert's laboratories and got the same answer: To recover the data they need another identical disk from which they can take spare parts. Can my case really be that clinical? Anyway, I am not sure if this question belongs to this forum, but I am looking to buy the following disk: IIBM ESERVER XSERIES IBM P/N 24P3707 IBM FRU 24P3708 146.8GB USCSI 10K RPM PART NOMBER 9V2005-027 I already bought a disk with the same part number, but the labs said that apparently I need a disk that was manufactured in the same factory. That means that all the numbers have to be exactly the same. If anybody know where I can purchase such a disk (the information on the lost disks is really important to me), please tell me the place.

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• Pc not booting, no video output, hard drive noises

  - by bullettime

  My computer suddenly stopped booting up. I just came back from a week long trip, and it was working fine before I left. When I power up the computer now, it seems to power up just fine (leds on, fans working), but then there's no output on the screen at all, and there's a noise that seems to be coming from the HD, like it is trying to read something. After the noise starts, it does 6 cycles and then stops. I'm not sure but I don't think it did this noise when the pc was still working. I tried using the onboard video card instead but it made no difference. What could be wrong with my computer?

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• random hard disk errors

  - by AugB

  For the past 2 years or so (4 year old custom build) I've been getting random moments where everything stops responding (or takes a very long time to respond) followed by I/O and hdd not detected errors on restart. To fix it, all I usually need to do is unplug my SATA cables from the hdd and mobo and plug them back in again and the problem disappears, at least for a little while (it ranges anywhere from a day to a few months time). Sometimes even a startup repair does the job. I've done multiple reformats and have also ran chkdsk more times than I can remember and both do not seem to help in the long run. Both the drives seem to be exhibiting the same problem. Have both my hdds been "dying" for the past couple of years, even though they are fully functional besides these occasional hiccups? Does the issue lie elsewhere? All feedback is appreciated. System specs: Biostar Tpower i45 mobo 2x WD Caviar 640GB hdds Zalman 750w psu Radeon 5870 gpu 2x2gb Gskill DDR2 ram Win7 64

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• Can't boot Ubuntu 12.04 from external Hard Drive using Mac

  - by Catgirl the Crazy

  Recently, I upgraded the RAM and hard drive on my Early 2008 Macbook to improve the performance. Rather than throw away the old hard drive, I bought an enclosure for it to turn it into an external hard drive, and, since all the data was migrated to my new drive, I decided to install Ubuntu on it for funsies (note: I am a near-total Ubuntu n00b). My first attempt to install Ubuntu didn't work (it gave me errors about not being able to find the BIOS or something), but my second attempt finished successfully (can't remember what, if anything, I did different). However, when I plug the external drive into my Macbook, it gives me a message saying it can't read the disk. Moreover, when I go into the Startup Manager (i.e.: what you get when you turn on the Macbook while holding the option key), the external drive is not one of the available startup disks. I thought this might be because I have an older Macbook, so I tried booting it with my mom's Late 2011 Macbook, and got the same results. Then I tried booting it through my dad's Dell laptop that runs Windows 7, and that time it worked. This is really counter intuitive to me, since the hard drive originally came from a Macbook, so if anything you'd think it would be less compatible with the Windows laptop than the Macbook. In case it helps, here's a link to a picture of how I set up the partition table while doing the install (not shown there is the fact that I checked the "Format?" box next to the /boot partition, since it gave me a warning when I tried to continue the installation without doing so) Anyone have any clue at all? If it helps, the hard drive I'm using is a 120GB 5400-rpm Serial ATA hard disk drive.

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• How to safely remove a USB drive on Windows CE 5.0?

  - by Radu C

  Until today, I assumed that Windows CE was writing everything to disk and I wouldn't end up with a broken FAT16 when I removed the USB stick. Today, I was proven wrong. I use a USB stick to test things on a WinCE 5.0 device. I don't write anything from the app or WinCE to the stick. I just execute my app, and my app reads its settings and pictures from the stick. Today, just this order of operations broke my stick filesystem (and I have to fix it). Is there a way to tell WinCE 5.0 to unmount the stick before I remove it? It sees it as a "Hard Drive", and the tap-and-hold menu has nothing along the lines of "safely remove drive". I'm happy with both code to do this operation and some trick that I didn't find in Windows CE yet. Thank you.

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• Windows 7 Can't Connect to Network Drive on Windows XP

  - by Alex Yan

  I have a Windows XP desktop and a Windows 7 laptop both connected to a TrendNET TEW-432BRP router, which is connected to the Internet. They both have static IPs. The desktop has an external hard drive connected to it. The laptop is wireless and the desktop is wired. I enabled sharing on the external hard drive about two years ago when I bought it. I mapped it as a network drive on the laptop. I think it was yesterday, the laptop just stopped recognizing any of the computers on my network (When I open network, my laptop's the only one on it). I also get an error message "An error occurred while connecting A: to \CERTIFIED-DATA\Expansion Microsoft Windows Network: The network path was not found. The connection has not been restored" when I try to connect to the network drive. Both computers run Avast, and there hasn't been any problems with it. This has happened before but I never figured out why and how to fix it. It's usually fixed when I reinstall the OS of the affected system. Edit: I can't navigate the computer using \\CERTIFIED-DATA. I get a message saying "Windows cannot access \CERTIFIED-DATA. Check the spelling of the name, Otherwise, there might be a problem with your network" I clicked diagnose on the message and it failed to find anything wrong I clicked diagnose on my wireless connection, and it just keeps trying to check if something is wrong with the connection I can ping it successfully

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• USB drive dead after stopping copying process on Snow Leopard Server

  - by Anriëtte Combrink

  Hi there I was copying to a flash drive from our Snow Leopard server when I stopped the copying process half way through. The device then disappeared from the Desktop. So I unplugged it and plugged it right back in. The device just didn't show up. I unplugged it and plugged it into a Windows XP machine as well as a Windows 7 machine. On both machines, I right clicked "My Computer" and selected "Manage…". On both PC's, the device was located under Removable Storage, but had no size and no drive letter. It shows up in "My Computer", but when I choose "Format…" from the right-click menu (context menu), it says the drive could not be formatted. Can someone please advise me? The flash drives is about 5 mins old and should have no reason to be dead. I really can't loose this drive (I don't need the data on it, I just need it to work again), any help would be appreciated. Thanks in advance.

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• How to provide users with isolated drive letters in Windows 2008 R2 (Terminal Server) [migrated]

  - by Pierre

  I need to be able to host several RDP sessions on a Terminal Server, where users of group A see a drive X: mapped to a given folder of the server and another group B see the same drive letter X: mapped to another folder. For instance : User 1, Group A X: --> C:\data\A User 2, Group A X: --> C:\data\A User 3, Group B X: --> C:\data\B User 4, Group C X: --> C:\data\C Is this possible. If so, how do I configure the virtual drive mapping so that the user has nothing special to do; i.e. I want the letter X: to be available to Remote Apps launched by the user, or if the user logs in to the remote desktop. Can I somehow use subst to get this to work? I would like to avoid, if possible, mounting drive letters on local shares (i.e. I don't like the idea of having to go through \\localhost\data-A to reach the user's data).

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• mounting external hard drive EXT4: "the unlocked device does not have a reckognizable filesystem on it"?

  - by user824924

  I'm having problems mounting ext4 partitions(inside a LUKS partition) in external drives. The drives are fine, there is no problem whatsoever with the drives and no filesystem corruption. This happened since a recent automatic system upgrade, and a manual upgrade to kernel 3.12.0. It goes like this: I plug in the external drive Passphrase is asked for luks device luks partition correctly unlocked/opened Instead of proceding with mounting the now exposed ext4 partition there's a pop-up saying: "the unlocked device does not have a recognizable filesystem on it". Same happens in this case: $ gvfs-mount -d /dev/sdc2 Enter a passphrase to unlock the volume The passphrase is needed to access encrypted data on WDC WD250... (250 GB Hard Disk). Password: Error mounting /dev/sdc2: The unlocked device does not have a recognizable file system on it Doing a manual sudo mount /dev/dm-1 /mnt/testfolder works with no errors and there is no problem with the filesystem (fscked). Also there doesn’t seem to be anything useful written to dmesg when this happens. What gives?

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• I don't have permission to access other drives

  - by mcjohnalds45

  After messing with the user accounts & names, I found I can't access my external drives without using sudo. So when I access one normally with cd "/media/john/FreeAgent Drive" I receive bash: cd: /media/john/FreeAgent Drive: Permission denied However, using sudo: sudo cd /media/john sudo ls -l It gives: drwx------ 1 john john 20480 Sep 24 10:45 FreeAgent Drive/ And id returns uid=1003(john) gid=1003(john) groups=1003(john), ... So I'm interpreting this is as "you are john, only john can access this drive, however, you cannot access this drive." I have tried sudo chown john:john "FreeAgent Drive" and sudo chmod o+rw "john/FreeAgent Drive"but I still can't access it.

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