Mac Pro :: Using RAID0 As Boot Drive - Block Size?

Nov 10, 2009

I've got a 2 drive 640GB Black Caviar RAID that I want to set up as just an OS and apps boot drive.

I realize larger block sizes have more through put but waste disk space, and smaller sizes save space but are less efficient.

My user folder (mail, media, itunes, video, docs) will be on a separate drive.

(1) So how do apps and OS files load at boot time and runtime?

(2) If apps like CS4 are large apps does it not make sense to set 256K as the block size?

(3) Or does OSX use many small files thus needing a smaller block size?

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Mac Pro :: How To Clone A Boot Drive On A RAID0?

Jul 14, 2009

I'm planning to replace my boot hard drive with a pair of RAID0ed SSDs. In order to familiarize myself with certain techniques I have build a software RAID0 from two 160 GB Maxtor SATA I hard disks. That went pretty much without problems. The two HDs are now sitting in position 1 and 2 in my Mac Pro.

The problem arises when I try to clone my boot drive onto the new RAID 0 drive. I was using disk utility and got an error message. Then I thought my fault was using disk utility from the HD which I wanted to clone and booted from the Leopard install disk. I then used disdk utility from that source to clone the HD boot drive to the RAID. Again I got the error.

What is going wrong? Do I have to approach this completely different?

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Mac Pro :: Can't Delete RAID0 Boot Drive?

Dec 30, 2009

I want to reformat and install SL fresh and am getting an error when i use Disk Utility (booting from SL DVD) to delete the RAID0 config. The error is "invalid request".

I have 4x640 in Software RAID0 that i boot from.

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OS X V10.7 Lion :: "MediaKit Reports Block Size Error" When Formatting Drive?

Jun 12, 2012

I got a new 2TB hard drive, and I'm trying to format it as HFS+ journaled case sensitive encrypted, each time I try I get the following error: "MediaKit reports block size error, usually caused by not being a multiple of 512." This is a brand new drive, it has a GUID partition map with one partition, that was created by Disk Utility, and the disk passed a full hardware scan from Drive Genius. Normally when I get an error I can google it, but this particular error only gives me links to RAID problems, and I'm not doing anything with RAID. What determines the block size? I did not get an option to set it anywhere that I could see. How do I fix this error and get my drive encrypted?

Info:
iMac, Mac OS X (10.7.4), 27" iMac

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Mac Pro :: How To Build RAID0 Boot System

Nov 11, 2009

I have a Mac Pro 2008. I just got my second Crucial 256 gig SSD. Wanna make it a Raid 0 with my first one. Here are my thoughts.

Process 1:

1. Use disk utility to restore image of original Crucial 256 SSD to external USB drive
2. Boot up with SL DVD
3. Build Raid 0 using two drives. (do I need to 0 out?)
4. Restore image to Raid 0
5. Boot

Process 2:

1. Boot off DVD
2. Create Raid0
3. Use SL to restore backup from time Machine to Raid 0
4. Boot

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Mac Pro :: Using Multi Leo/Vista Boot RAID0 Arrays From SSDs

Aug 4, 2009

As we discussed in other threads it could be particularly advantageous to use SSD RAID0 arrays for dual or even multiple booting. With a decent amount of striped SSDs the idea is to run all your operating systems and applications with high speed. At least that is the theory. To test the idea I have decided to use two Maxtor 160 GB HDD in a very basic dual RAID0 array configuration for booting OS X and Vista-64 in AHCI mode.

Here we go:

First thing I learned is that you have to partition the HDDs prior to building your array.

Second thing I learned is that you have to keep it all in HFS+ to make it work.

So now I have used disk utility to create two equal size partitions in HFS+ with GPT on both HDDs.

Next I fused the two lower partions together for a first RAID0 array named 2R-Leo. Format is still set to HFS+ and RAID0 mode is selected.

Then I fused the two upper partitions together for a second RAID0 array named 2R-Vista. Here format is also set to HFS+ and RAID0 mode is selected.

With that done I exited the disk utility to get a fresh start on it. I then entered disk utility again.

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Mac Pro :: Time Machine Drive - RAID0 V Slower Single Drive

May 27, 2010

I'm a graphics professional taking the plunge into a Mac Pro. After some research, this is my notional drive setup:??GB SSD Boot Drive in the optical bay2 x 1TB 7200rpm SATA in RAID0, partitioned for 1.Data and 2.Scratch (therefore <2TB data)I obviously need to make sure that RAID0 is safely backed up. I've got an online backup service in case my house burns down and I'll be backing up individual projects onto optical media, but I will of course want to Time Machine the Data partition of the RAID.Now, for that Time machine drive I can either create another RAID0 from the same kind of drives (with the risk that entails), or for about the same money get a 2TB 5400rpm (leaving a drive bay free for future use, possibly another backup).

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OS X :: Change Block Size On HFS Partition?

Mar 18, 2009

Is it possible to change a block size? I have a RAID 0 partition dedicated to video capture. Having blocks larger than the default 4KB would benefit performance. Could not find any options in neither Disk Utility nor Terminal�s diskutil command.

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Mac Pro :: HDD Options - Single Drive Or Raid0?

Sep 8, 2009

I'm having a hard time deciding what to do with my two open HDD bays in my Mac Pro.I know I want to add more storage, but I'm not sure if I should use Raid0 or not.I store most of my media on a server but wanted to store the following in my MacPro and would need more hdd space.Bootcamp - obviously can't store in serverScratch drive - would write handbrake encodes to this then transfer to serverIn all I'll need around 1.5tbI already have a 1.5tb drive and would only consider buying another to put them into raid0. Should I bother with raid0 for the increased speed or just use the 7200RPM 1.5tb drive I already have?

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Mac Pro :: Vista Business Not Installing On Dynamic (RAID0) Drive Volume

Aug 11, 2009

I have successfully striped two SSDs in Vista Business-64 on my MacPro1,1. I have used Vista's data carrier administration program for this. As expected the array isn't recognized in OS X. So I cannot just dump a Winclone image on the array. That would have been much to nice!

My next strategy was a total backup with Vista's own backup program on another HDD. That went without a hitch. I then hoped that booting the Vista install DVD with the backup drive present and the RAID0 array would allow me to restore the backup on the RAID array. Unfortunately Vista will not recognize the array running of the install DVD. Loading AHCI or IMSM drivers will not change this situation.

It appears that you have to make the dynamic data carrier active if you want to install Vista on it. Unfortunately the data carrier admin program will not let me do this. I would do it in DISKPART if I knew it was possible and how to do it.

So the question is does anybody know how to install Vista Business to a dynamic data carrier? If I cannot figure out this soft RAID0 I will ave to buy a RAID controller which I thought I might avoid at this point.

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Windows On Mac :: Ubuntu Block Out (Installed On External Drive)

Sep 6, 2009

I tried to install Ubuntu 9.04 on 500 GB external drive and it will now no longer boot Ubuntu nor Mac. I need to know how to fix this. Things already tried:

*Backing up harddrive and installing Snow Leopard (10.5.4 is what it is)
*Deleting the external harddrive and reformatting it.

I want to be able to keep all my mac files. The file with a ? appears when the Ubuntu livecd is not in. (that is the only thing that boots).

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Mac Pro :: Replacing Boot Drive & Boot Camp Drive With Large Drives

May 30, 2008

I've been hearing good things about the Spinpoint Drives and the 750GB ones are coming down in price.Here is my current setup1 - 500MB Drive - Leopard2 - 320MB Drive - Vista 643 - 500MB Drive - FAT32 (Shared, Irrelevant)I plan on replacing drives 1 and 2 with 750GB Spinpoint drives.My question is, can I boot off of the Leopard dvd and put in Drive 1 and NewDrive1 and just clone it, and do the same for Drive2 and NewDrive2 and clone it? And then go into Leopard and resize the HFS partition, and go into Vista and resize the NTFS partition?

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MacBook Pro :: Won't Work With Size / Increasing The Font Size And Icon Size

Jan 13, 2010

I'm must be hitting some strange key combination / trackpad gesture (I just got a macbook pro) and my font size in safari keeps randomly increasing. This happens on the desktop with the icons as well.

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Mac Pro :: Using Sandforce SSD's In RAID0 - Does Background Collection Still Work

Aug 26, 2010

I am thinking about adding a pair of Sandforce SSD drives in RAID0 on my Mac OSX device. Since OSX does not support trim I am dependent entirely on over-provisioning and idle garbage collection to keep SSD drives in good shape long term.

My question is if you use two drives that support BGC in a software RAID0 configuration does the BGC still work as effectively as with a single drive long term?

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Windows On Mac :: Reducing The Size Of A Boot Camp Partition?

Jan 2, 2011

I've checked out this link and I'm downloading GParted Live in the hope that it will allow me to reduce the size of my current 32GB Boot Camp partition that has Windows 7 installed on it.

I'm shrinking the partition because I never use Windows, I just have it installed in case I need it at some point. And I got a free copy from my University, so why not?

I just have a few questions before I dive in to this;

Will GParted be able to shrink my partition to a size of about 8GB or 16GB?

Will it corrupt any of the Windows 7 OS in the process?

Will it corrupt any of the OS X, or my data stored on my OS X drive?

Will I be able to run GParted from a USB drive?

What is the (or your personal) recommended minimum size of a partition drive?

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Windows On Mac :: Extend Partition Size On Boot Camp?

Nov 20, 2009

is it possible to extend my partition size on boot camp without re-formatting?

i'm on unibody macbook pro running 50gb of Windows 7, i'm running out of space right now and I'm thinking to extend it to 70-80gb to install more games on it.

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Windows On Mac :: How To Increase The Size Of A Boot Camp Partition

Jun 3, 2010

I want to make my windows partition bigger, but I don't want to have to delete my current one, re-partition, and then have to re-install everything. Is there a way to do this?

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ITunes :: Ion An SSD Drive (the Boot Drive), Can It Read The Music Library Of A Second Rotational Drive

Feb 1, 2012

If I have iTunes on an SSD drive (the boot drive in my Mac Mini), can it read the music library on a second rotational hard drive? I'd like not to have the large music library on a 120GB SSD drive.

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Power Mac G5 :: Cannot Boot From DVDs - Defaults To External FW Boot Drive With 10.3.x

Dec 20, 2007

This is bad and old, and full of lessons about backing up. Anyway, internal boot drive crashed a week ago, and internal optical drive is busted. New external LaCie dvd burner works fine, but all attempts to start up from Tiger, Leopard and Diskwarrior installation disks just end up back in OS10.3 on my external LaCie FW drive. I've tried many things: unplugged everything; switched external LaCie to USB (wouldn't boot), unplugged power from internal optical drive so Mac wouldn't look there first (somebody suggested that). Attempts to start up installers from mounted DVDs result in installer screen with restart button, which, when clicked on, results in... you guessed it... boot back to dreaded 10.3 system. Night owls and westcoasters, I am up for hours yet, pulling hair.

Information:
G5 Dual 2GHz
Mac OS X (10.4.3)

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OS X V10.7 Lion :: 10.7 Won't Boot Unless Hold Option Key And Select Boot Drive

Apr 27, 2012

Last week I finally upgraded from 10.6 to 10.7, but now my Mac Pro (2008) won't boot properly.  It'll start to boot with the gray screen and the Apple logo, but then the entire screen goes gray and it just locks up there.   However, if I reboot and hold down the Option key to bring up the list of bootable drives that works fine. I've checked my Startup Drive settings and the proper drive is selected. why it won't boot on it's own anymore?  Holding down the Option key is getting old. 

Info:
Mac Pro - Octo Core, Mac OS X (10.5.6)

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Mac Pro :: Best Setup For Dedicated Boot Drive? - Possible To Boot From RAID 0?

Jan 25, 2009

I decided that I couldn't wait for Gainestown and ordered a 2.8x8 MP today. I'm going to get another 8GB of RAM (I assume 10GB in matched pairs will still perform at full speed). My real dilemma is a Boot/Storage solution-I'm moving from a Dual 867 G4, so all my current drives, both internal and external are IDE, which basically means I'm starting over as far as internal drives goes. The G4 power supply gave out so I'm getting this external enclosure to put my old drives into for file recovery. As far as new drives go, I can't figure out what to do. I'll spare you my million iterations of drive configs I've sketched over the past two days.

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MacBook Pro :: Switching The Boot Drive (want To Boot From The Optibay) How Can This Be Done

Mar 28, 2010

I run SSD/HDD, my HDD in the optibay is broken, I stuck it in a external and it makes finder freeze, it got bumped around too much so I want to put a new one back in the 'correct place' for a spinner, and stick the SSD in the optibay.(I figure the extra 2% of shock protection offered by the orange rubber circle things is worth the trouble of moving everything).

I am also going to buy a WD 3 platter 1TB laptop drive, and I read that they fit fine in the regular spot in MBP's (I'm going to open and measure in a min.)Anyways, there's no BIOS, only EFI, so how to I pick what drive to boot from? with 10.6 is it as simple as holding option down on boot, and picking my 'OSX' HDD, and then it will auto boot from that until I specify otherwise? (I ask because before 10.6 people on here were always talking about how to switch boot drives.)

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OS X :: To Increase The Size Of The Hard Drive Icon?

Jun 7, 2009

Like the title says, anyone know how to increase the size of the icon of the hard drive. I have a huge 24 inch monitor and would like my hard drive icon to be nice and big.

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MacBook Air :: Size Of Software Reinstall Drive?

Oct 28, 2010

Does anyone know the size of the Macbook Air Software Reinstall Drive? Can it be used to drop data on with the dmg sitting on it or is it just the dmg and no more space?

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PowerPC :: Is There A Limit To The Size Of Hard Drive

Jun 1, 2008

I just purchased an iMac G5 (1.6GHz) w/ a bad hard drive. Is there a limit to the size of hard drive that I can put in it? I was wanting to put a 500GB SATA in it, will that be ok?

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OS X :: Not Displaying Hard Drive Size Correctly?

Sep 14, 2009

I enabled view item info so it looks all snazzy and **** .The problem is it says 297.77 GB,,...62 GB free when i have way more free space

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OS X :: How Long To Calculate Size Of External Drive

Dec 12, 2009

I am in the process of migrating files from a Dell laptop running XP to my new iMac. Essentially an easy task as all the files are on an external drive.

I have 2 TB of storage on the iMac and thought it would be a relatively simple task to copy from the external hard drive to the iMac.

After connecting the drive to the iMac I then tried to get the size of a directory on the external drive. I've been waiting about 15 minutes now and it still says "Calculating Size".

Just after doing this I started a copy to move files from the external drive to the iMac. Unfortunately all I see at present is the spinning beach ball.

Just wondering if there's a way of cancelling the copy process or of getting some status as to what is happening?

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Power Mac G5 :: Hard Drive Size / Buffer Compatibility

Oct 31, 2007

Am I limited as to the GB size or other specs, (other than case size), in installing a second drive in my G5? Is there a Gb limit that it can't handle? A buffer rate that it can't handle or is overkill? I need to get a HD for it ASAP, preferably tonight, and need to know what limitations I have if any.

Information:
G5 Dual 2.0 1.5gb Ram /Powerbook G4 1.67mhz 1gb Ram
Mac OS X (10.4.10)
G5 Soon to be OS X 10.5 5.5GB Ram w/ 256mb Video card

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Power Mac G5 :: Upgrading Hard Drive To Larger Size?

Dec 15, 2007

I have a power mac G5 2.7 that is 2.5 years old. It came configured with two 400GB drives inside as it will only hold two. I now really want to change them out to either two 750 GB or preferably two 1TB drives. Apple, however, has told me it won't work and that my unit will not handle this huge additional power consumption. I have called mac mall and they say no way as well. OWC says they have many working like that and its never been a problem. Then I called Apple again and they said it will work fine. I have 6 more months of Apple care, but either way do not want to blow the interior of this system up. I know I need SATA drives and would ideally like to purchase the Hitachi Deskstar 7K1000.

Information:
Powermac G5
Mac OS X (10.4.3)

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MacBook Pro :: What Determines Maximum Hard Drive Size

Feb 12, 2009

What deteremines the max hard drive for the early 08 macbook pro's? Is it the physical height? or is there a gb limit? I saw this 500gb barracuda drive at bestbuy for $80 running at 7200 rpm and 16mb cache buffer. so it sounds good. But is there anything coming out soon with higher rpm's or higher capacities for laptops? i know theres ssd but thats expensive and low capacity compared to sata for now.

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