Can't boot to mac os

I recently installed 10.6 on my mini. Then I discovered that my old parallels wouldn't work with it. When I installed xp in bootcamp I received the following message: "Windows could not start because the following file is missing or corrupt: (windows root)/system32/hal.dll. Please reinstall a copy of the above file." I get the same message on reinstall. Now I cannot boot to ANYTHING. Holding the ALT key will not boot to the make side and I can't boot to the 10.6 disc holding the C key. What can I do???

Use your backup(s). Erase and restore.
Also XP is not being actively supported.
With OS X upgrades you always need to check and make sure you have the latest, like Parallels 7, or there is VirtualBox 4.x
Sounds like you simply had a corrupt hard drive.
Lion 10.7 will only support Windows 7 except in a VM.

Similar Messages

  • I tried partitioning my HD to install linux, the installion was not successful and now I can't boot my mac, I tried internet recovery, it was not helpfull as the disk utility cannot delete the partition I created.

    I tried partitioning my HD to install linux, the installion was not successful and now I can't boot my mac, I tried internet recovery, it was not helpfull as the disk utility cannot delete the partition I created. It was only showing me an error message "EFI files are missing", I realized that it is trying to boot from the new partition I created for the installation of the linux I intended to do.

    It sounds like you may have multiple problems, but none of them are likely to be caused by malware.
    First, the internet-related issues may be related to adware or a network compromise. I tend to lean more towards the latter, based on your description of the problem. See:
    http://www.adwaremedic.com/kb/baddns.php
    http://www.adwaremedic.com/kb/hackedrouter.php
    If investigation shows that this is not a network-specific issue, then it's probably adware. See my Adware Removal Guide for help finding and removing it. Note that you mention AdBlock as if it should have prevented this, but it's important to understand that ad blockers do not protect you against adware in any way. Neither would any kind of anti-virus software, which often doesn't detect adware.
    As for the other issues, it sounds like you've got some serious corruption. I would be inclined to say it sounds like a failing drive, except it sounds like you just got it replaced. How did you get all your files back after the new drive was installed?
    (Fair disclosure: I may receive compensation from links to my sites, TheSafeMac.com and AdwareMedic.com, in the form of buttons allowing for donations. Donations are not required to use my site or software.)

  • Can you boot a Mac Pro using a USB Pen Drive?

    Hello.
    Can you boot a Mac Pro using a USB Pen Drive? OS=Windows or Linux or BSD or MacOS... I know it is bios specific on a PC if the option is available. If this is possible, does anyone have a link to instructions?
    Thanks,
    Scott

    Not to get in to an argument over semantics here, but by saying "Windows should boot if you have installed the requisite Boot Camp drivers," you are implying "that the Boot Camp drivers [are] needed for Windows to boot." I was just clarifying your post so people didn't get confused.
    As for booting a Mac Pro off a USB flash drive, if you have been successful in doing so, can you share with me your method? I've tried booting of an OCZ Rally2 4GB flash drive and it's never worked on my Mac Pro. It doesn't show up when I hold option down and if I try to boot through rEFIt, I get an error about my Mac's firmware not supporting USB booting (I have the latest firmware installed, too). I've tried GPT and MBR partitions, both to no avail. Booting off USB hard disk drives is no problem though. And I can boot off this flash drive on a Core Duo iMac.
    Any ideas?

  • Can't boot into Mac OS after Windows install via Bootcamp

    Hello.
    Last night I installed Windows 7 on my Macbook Pro early 2011 via Bootcamp.After some major complications I was able to finally install Windows 7 and boot into it. Now I can't boot back into my "Macintosh HD" partition, it shows a no entry sign.
    Hard Disk : 320GB Internal Sata
    Partitions : 3 -> Mac, Bootcamp and 10.8 Recovery Partition
    The good part is that I can still access the Mac OS partition in Windows and Windows is working perfectly fine. As a matter of fact right now I'm on the bootcamped windows.
    I have a full time machine backup but still I am looking for a way to solve this without formatting the HDD.
    Things I have tried:
    1. Resetting NVRAM and PRAM
    2. Booting into 10.8 recovery partition and running DU.
    SMART Status : Verified
    "Macintosh HD" grayed and Not Mounted
    Successful Verify Permissions (Twice)
    Is there a way to solve this? Though the Mountain Lion partition shows when I press the Alt/option key on startup but I can't somehow boot into it.
    Thanks

    Your problem is OS X is refusing to boot.
    There is still a bootable volume on the Macintosh HD partition, it's just not working.
    You can #8 Reinstall Just OS X while command r booted from the Recovery partition, as long as you don't use Disk Utility to erase the Macintosh HD partition, your files and programs remain.
    Hook the computer via Ethernet cable to a router (or modem, power reset required) with a fast relaible internet connection, you will need your AppleID and password to reinstall OS X.
    Step by Step to fix your Mac

  • Can't boot to Mac osx, Error -2100F

    Hi there,
    I got a Macbook Pro Retina Late 2012, and I made a dual boot to Windows 7 today.
    The problem is when I try to boot to Mac osx it automaticly start up as Windows 7.
    I tried to use the Command key to get the Mac osx running and the only boot that I see is Windows 7.
    After that i tried using Command + R to recover it and it gave me an error -2100F.
    I also tried to use Boot Camp to Boot to Mac but that also goes straight to Windows.
    My guess is that I deleted the wrong partition when I installed Windows 7 and that i am unable to boot to Mac osx now.
    Can anyone help me fix the problem?
    Thanks in Advance

    Use your backup(s). Erase and restore.
    Also XP is not being actively supported.
    With OS X upgrades you always need to check and make sure you have the latest, like Parallels 7, or there is VirtualBox 4.x
    Sounds like you simply had a corrupt hard drive.
    Lion 10.7 will only support Windows 7 except in a VM.

  • I can't boot from mac installation disc even while holding 'c' button

    I can't boot from installation disc even while holding 'c' or 'option' button. It remains at the grey screen. How do i overcome this?

    Can you boot normally and use System Preferences> Startup Disk to select the CD as the boot volume?

  • Can't boot Power Mac G5 up from anything (DVD, USB or HDD)

    Hope someone can help me with this one
    My mum has an old PowerMac G5, the dual-core 2GHz one (I can't remember what it is exactly) and it won't boot up anymore.
    At first I replaced the hard drive because it was making some funny sounds... scratchy-ness.. then with the new hard drive, my dad was able to install 10.3 on it which booted up pretty reliably after reseting the SMU. Then I thought I'd replace the 10.3 installation with 10.5.8, so i tried to install it off a 10.5.8 disk just by booting into to 10.3, opening the disc and clicking the 'Instal Mac OS X' thing, then restarting. But the computer would just keep restarting to 10.3
    long story short, the computer won't even turn on now. The light next to the power button doesn't come on, but the fans are on and the hard drive is alive. I've tried booting from the original 10.3 DVD, but that doesn't work either. The DVD drive spins up for like 20-30 seconds, then stops.
    I've got one of these: http://www.everymac.com/images/monitor_pictures/apple_cinema_display.jpg and the power button light doesn't come on on that either.
    The computer was working fine up until a few days ago.
    I've reseated the RAM, reset the SMU, tried booting with C held down. Nothing seems to work.
    Thanks in advance

    Yeah, the monitor button turns the mac on, but once the comp is on, the light goes off and the screen stays black
    I'll give it a go, but I don't believe so.

  • Can't boot into Mac Partition

    I started out with a simple error in iTunes whenever I tried to update my genius. The error was the following:
    "We could not complete your iTunes Store request. An unknown error occured (-9812). There was an error in the iTunes Store. Please try again later."
    I read on apples support page http://support.apple.com/kb/TS3222 that I needed to delete my VeriSign certificates. However, there were no certificates in the "login" section of my keychain, only in the "system root" section. I tried to delete the root Verisign Certificates but couldn't.
    Next I read that I could clear my cache and that would help, so I cleared my system cache and deleted my cookies in Safari. Didn't help.
    So I reset my login keychain several times and nothing happened. I decided to restart my computer, and I was able to access the login screen. However, when I entered my username and password they didn't work so I couldn't log into my account.
    Since I have a windows partition, I booted up into windows and downloaded a program called MacDrive 8. I looked in my keychain folder under /Users/username/Library/Keychains and discovered that I had several "login.keychain" files. The first was named "login.keychain", the others were named "loginrenamed1.keychain", "loginrenamed2.keychain", and "loginrenamed3.keychain".
    Other files in the folder were "MicrosoftIntermediateCertificates" and ".fl62323D2F" and ".flA6A9AF81" in case you needed to know.
    I decided to copy the three "loginrenamed#.keychains" to my desktop (and remove them from the keychain folder) and then reboot. This is where my major problem started. I received an error on the white screen with the apple logo on it. It said "You need to restart your computer. Hold down the Power button until it turns off, then press the Power button again". I did and it came up with the same error.
    I logged back into the windows partition (by holding down "option" at the startup screen and selecting my windows drive) and put the renamed keychains back in their original folder. However, when I rebooted onto mac partition I get the same error at the startup screen, even though I placed the renamed keychain files back into their original folder.
    This is the error:
    npvhash=4095
    PAE enabled
    64 bit mode enabled
    Darwin Kernal Version 10.4.0: Fri Apr 23 18:28:53 PDT 2010; root:xnu-1504.7.4~1/RELEASE_I386
    vmpagebootstrap: 906786 free pages and 7625 wired pages
    standard timeslicing quantum is 10000 us
    migtable_maxdispl = 73
    Kext com.apple.driver.AppleACPIPlatform - library kext com.apple.kpi.mach not found
    Can't load kext com.apple.driver.AppleACPIPlatform - failed to resolve library dependencies
    Kext com.apple.driver.AppleACPIPlatform failed to load (0xdc00800e).
    Failed to load kext com.apple.driver.AppleACPIPlatform (error 0xcd00800e).
    Couldn't alloc class "AppleACPIPlatformExpert"
    panic(cpu 0 caller 0x5591db): "Unable to find driver for this platform: \"ACPI\".\n"@/SourceCache/xnu/xnu-1504.7.4/iokit/Kernal/IOPlatformExpert.cpp:13 89
    Debugger called: <panic>
    Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
    0x509cbda8 : 0x21b455 (0x5cf328 0x509cbddc 0x2238b1 0x0)
    0x509cbdf8 : 0x5591db (0x5d8c04 0x6a0f4d0 0x509cbe28 0x6a84f80)
    0x509cbe18 : 0x538e50 (px6b8c180 0x6a75d80 0x1 0x4c1e6)
    0x509cbe78 : 0x537085 (0x6a75d80 0x6b8c180 0x6b66a80 0x5000ae)
    0x509cbf28 : 0x537616 (0x6a75d80 0x6a7c6c0 0x8 0xffffffff)
    0x509cbf78 : 0x5392c5 (0x6a75d80 0x0 0x509cbfac 0x1
    0x509cbfc8 : 0x29e6cc (0x6b4b2b0 0x0 0xffffffff 0xffffffff)
    BSD process name corresponding to current thread: Unknown
    Mac OS version:
    Not yet set
    Kernal version:
    Darwin Kernal Version 10.4.0: Fri Apr 23 18:28:53 PDT 2010; root:xnu-1504.7.4~1/RELEASE_I386
    System uptime in nanoseconds: 121162823
    I recently found out all that I should have entered my Snow Leopard DVD and reset the password on my account. However, since I heard about this after this error occurred, when I try to reset my password it say there are no users on my Macintosh HD to reset the password for.
    On the disk I tried disk recovery, but at the end of the recovery process it said that the disk couldn't be repaired and that I needed to back up my data and reinstall the OS.
    I realized in the error that there is a missing kext file. Is it possible to download this file and place it in its right location on the hard drive?
    Any help would be greatly appreciated!

    kevinature wrote:
    On the disk I tried disk recovery, but at the end of the recovery process it said that the disk couldn't be repaired and that I needed to back up my data and reinstall the OS.
    And this is what you need to do, except the message almost certainly said to reformat the volume, not just to reinstall the OS. All the other stuff you did somehow damaged the file system of the Mac partition, so replacing a missing kext file will not help.

  • Can not boot from Mac OS X Install Disc 1, G5, Snow Leopard

    I have version 10.6.8 installed. Compter is a 2 x 2.66 GHz Dual-Core Intel Xeon. 6GB memory
    I want to run Disk Utility and startup from the install CD that came with the computer (the grey one, disc 1, or even the retail disc Mac OS X Snow leopard, the whit one) but I CAN NOT DO IT. So frustrating.
    I restart, hold down the "C" key, before the chime, after the chime, every which way, and my Mac always acts as if I am simply restarting, goes right to the login screen everytime. I tried holding down OPTION on restart to choose which to startup from, but only saw the hard drive as an option. I open System Preferences, Startup Disk and the install CD does not even show up as a choice to start from, yet the install CD shows up in the finder.
    What am I doing wrong?
    Thanks

    OK.
    According to  the knowledge base that model should have shipped with Tiger, 10.4.7.
    Going to need some thought here, though. I was going to suggest a possible problem with the optical drive, but you say the DVD mounts on the desktop as a normal DVD would?
    Nevertheless, do you have access to another Mac or an external HD with a bootable OS X on it (later than the Tiger version your Mac Pro shipped with)?
    If so, try booting from the external, or from the other Mac using Firewire Target Disk mode, and using DU from one of those sources to repair the MP's internal HD, then try the disc(s) again.

  • I can't boot my Mac anymore

    That's pretty much the problem.
    You see, it's an iMac from the Late 2007 If I'm not mistaken. It's pretty much the third time I've had to renstall the whole software, the first time for unknown reasons and the second because everything within was deleted, out of the blue.
    This time around, I'm told (by family at home) that the computer froze, and they used the safest method to turn it off, a.k.a. Press the power button for several second until it turned off. Ever since it didn't boot anymore.
    I press the power button and THE flashing folder with a question mark pops up after some seconds, and that's pretty much all I can do. I've tried booth in Safe Mode (with Shift), booting in Recovery HD (Command-R) and even tried Startup Manager (Option key), but i only get a floating cursor and nothing else happens. Literally nothing else happens.
    I thought it was the HDD Finally crashing, so I left it alone for some time, and incredibly the next time I tried it booted perfectly. As if nothing had happened. But it froze again, we had to power it down as mentioned above and this is my third day trying. No success except for that bit of magic.
    Now, the Mac doesn't really have any important information anymore, and I don't have a Time Machine backup either, but it'd be nice if my files didn't erase this time around. To be honest it sounds like the HDD finally died, but again, it booted normally after one night, sadly not anymore. I personally have my suspicions on the cable, but I'm not the expert.
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    Startup Issues - Resolve
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  • Can't boot into Mac OS X.4

    I installed Mac OS 9.2.2 on my PowerMac AGP and when I go to change the startup disk to OS X.4 it doesn't show up. How do I get it to show OS X.4 so that I can go back to Tiger? Thanks

    Hi, Billie -
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    Article #TA20774 - Disk Is Available in Mac OS X But Not in Mac OS 9
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    The article I linked to offers one possible way to avoid having to reformat the drive - if the drive had ever had OS 9 drivers on it previously, i.e. had been usable when the machine was booted to OS 9, it may be possible to re-install the OS 9 drivers. To do that, boot the machine to OS 9, and run Drive Setup (OS 9's formatting utility). Select the drive in the list, then select Update Drivers from the Functions menu. If this works, the drivers will be re-installed; unfortunately it rarely works.
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  • TS1440 My start up stop on the Flashing folder screen, and I can not boot my mac...

    I just tried to restore my Macbook Air (2011), and something goes wrong, because now there is a Flashing Folder with ? Mark on it... And even if I Start Up the system with the "option" button pressed, the HD icons does not appear...
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    Question (?) Mark, Blinking Folder, or Gray Screen at Startup
    These are related but not identical issues. Their causes are outlined in Intel-based Mac- Startup sequence and error codes, symbols. Solutions may be found in:
    A flashing question mark appears when you start your Mac
    Mac OS X- Gray screen appears during startup
    In most cases the problems may be caused by:
    Problem with the computer's PRAM - See Resetting your Mac's PRAM and NVRAM.
    Boot drive's directory has been corrupted - Repair with Disk Utility.
    Critical system files are damaged or deleted - Reinstall OS X.
    The disk drive is physically non-functional - Replace the hard drive.
    Repair the Hard Drive and Permissions
    Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list.  In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive.  If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
    If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
    The main difference if you are using Lion or Mountain Lion is that you must first boot from the Recovery HD:
    Boot From The Recovery HD:
    Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
    Reinstall Snow Leopard Without Erasing The drive
    1. Repair the Hard Drive and Permissions
    Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list.  In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive.  If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
    If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
    2. Reinstall Snow Leopard
    If the drive is OK then quit DU and return to the installer.  Proceed with reinstalling OS X.  Note that the Snow Leopard installer will not erase your drive or disturb your files.  After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
    Download and install Mac OS X 10.6.8 Update Combo v1.1.
    Reinstalling Lion/Mountain Lion Without Erasing The Drive
    Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
    Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
    When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list.  In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive.  If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu.
    Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Continue button.
    Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

  • Can't boot my Mac after attempt of Time Machine backup

    So guys,
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    I booted my new Mac in recovery and started the time machine process. It went trough, found a backup that I wanted, asked me for my password and all looked nice. When the process started, it said something is wrong and rebooted. Now each time I want to start time machine backup process, I get the same message that says "searching for disks" when it comes to the moment of finding the system drive in the lap top. It will not boot any longer to the system. When i wanted to reinstall Yosemite, it doesn't see the drive that is supposed to see to install it. It sees only some small recovery drive. When I go to disk utility, I see Machintosh HD and some disk 1 drive that has sub group OS X Base System. Non of the options on drives like erase, format or similar are available. I basically can't do anything.
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    Thanks in front!

    Please install OS X on an external device (USB/FW/TB/Flash disk-16GB) using OS X: Installing OS X on an external volume - Apple Support and boot from it.
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  • Can't Boot My Mac Pro

    Hi All
    I installed the latest set of apple updates on Monday night, and allow my computer to restart to finish the install. But now when it try’s to restart, it makes the chime noise, the white screen appears followed 30 odd seconds later by the Apple logo and the spinning disc. Then maybe 10 seconds later, i hear two of my hard drives cut out, followed a few seconds later by the other two, then the machine restarts again, and just repeats this over and over.
    I've tried Putting the Leopard CD in, and holding down C to boot to CD, but this always fails and it won't boot to the CD. I tried holding Alt as if i wanted to boot camp, and i get the boot menu, with the Leopard CD there as well, and only two of my hard drives, and a 3rd Hard drive icon titled EFI BOOT???
    Even if i try to boot to the CD or any other drive, after a minute of it trying to boot, the entire machine just kernal panics.
    I connected the machine to my MacBook using a Firewire cable, and started it using T (target disk mode) and it appears on my MacBook, with all 4 hard drives plus the array. I've run disk utility on the MacBook on the array and disks all appear fine.
    I've also reset the PRAM and the SMC controller.
    Does anyone have any idea's, as I’m now utterly stumped?
    Thanks all.
    R

    Before you do any updates, clone your system and repair your disk drive first, then do a Safe Boot and either use standalone updates, or use the menu option to download and save but not update and do update later. Download to another location maybe than your hard drive too.
    Repair your drive before there are problems.
    The EFI is one of your boot drives.
    A Safe Boot, or booting into Single User Mode and running FSCK -FY is one way in an emergency to try to repair a drive.
    So, you have another disk drive you can boot from, but can't?
    Try removing your system drive and see if you can boot from DVD then, which would say it is a severe directory problem most likely.
    Invest in Alsoft Disk Warrior or TechTool Pro (4.6.2 and 5.0 comes out soon as free upgrade). Or TechTool Deluxe.
    You say "array" so do you have the Apple Pro RAID card? or are you booting from software RAID?

  • I can not boot my mac pro 5,1 while holding Option key

    Hi,
    I have a mac pro 5,1 (3.33 six cores, 10.9 OSX) running a RAID 0 on a Sonnet Technologies PCI-E Tempo SSD Pro with two Samsung 840 pro 256GB.
    I would like to reinstall from a USB or recover the machine so I restarted it while holding the Option key.
    It did not work. What I have is just a white screen with the mouse pointer (arrow). I tried many time but nothing change.
    I restart with pressed C key, Command+Option+R....: nothing works. I reinstalled by downloading a fresh copy of OSX 10.9 but nothing helped.
    So I post here in order to get solutions from the experts.
    If you know what to do for my case then please help me out.
    Thanks and regards,
    nhvma

    installing OS X to a PCIe controller often won't work. What does:
    Install to a drive on SATA 2 bus, then clone it over to your RAID. And create the RAID with 10.9.
    Personally I have yet to read, hear of or experience in years that booting from arrays really helps. Larger volume yes but a single SSD is fine. Even putting one like yours on the SATA II bus and use the PCIe card for graphic library, for scratch, other uses where it does help and matters.

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