How does disk utility decide which optical drive to use for burn?

This is a somewhat daft question and purely out of interest.
How does disk utility decide which optical drive bay to open for burning?
I have two drives in a MacPro and both have the same capabilities (DVD-RW). Why does it sometimes open the lower one, and sometimes the top one?

Grant Bennet-Alder wrote:
The estimate is based on how long it already took to do how many blocks, and how many blocks are left to do. If you told it to overwrite 35 times, it will be a long, long time before it completes.
The estimate is made grossly large by the presence of Bad Blocks that need to be Read during the test (not the case with Erase and Write Zeroes).
Each Block is written with some redundancy bits, so that small errors can be corrected on reading. A Bad Block causes the drive to re-read. and re-read, and re-read, in hopes of getting correctable data the next time. This should NOT be an issue in writing. But if the drive stops responding (which can and does happen with a bad drive) the Erase function will just sit there, thinking it is making progress, and stretching out the time.
Thanks, Grant.
If I read your reply correctly, Erase and Zero Out free space shouldn't elongate the process, because there's no read occurring.
The drive will not be Mounted while Disk Utility works on it, so it will not be on the Desktop. But ask Apple System Profiler \[ About this Mac > More Info > Serial ATA ] if the drive is still THERE . If it cannot be seen, you have your answer -- the drive dropped out of sight while being tested -- Bad Drive.
Well, now I am confused. It's a FW800 drive. It's on the Desktop. And it appears under FireWire in System Profiler. AND Disk Utility shows a mount point. But the Unmount and Eject buttons are grayed out.
Will the drive be mounted if it fails to respond to Disk Utility? That doesn't seem to make sense.
How do I determine its status? It appears to be stuck at "1 day, 5 hours" but it'll take an hour for that to change. I think it's been that long since I first noticed the time.
Harv

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Which optical drive is good for my macbook air?

which optical drive is good for my macbook air?

That's a bit like asking what type of car you should buy ...
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Bootable backups - disk utility and which external drives

hi all
(maybe) a simple question
i have been using time machine for my back ups but i am now planning to have a second backup program. i'm looking at using a bootable clone in this regard.
i started looking at super duper and ccc however a few stumbling blokes have just popped up (well at least warning signs that may be of no issue at all - hence this question)
* can ALL external drives be used for bootable backup purposes?
I have a couple of western digital ones - my book essential and my passport.
On the western digital website, it does not have my model numbers listed - does it matter?
Is it a case of any usb connected external drive can be used for intel macs? - i am getting conflicting views on various postings i have seen re this question
second part/question is:
i also understand disk utility can be used for cloning (no updates, just full clones) and as a bootable back up.
if, just for the purposes for having a back up bootable drive, can i set up a clone without too much regard for recloning it (say every 2 months) and if i need to use it, then boot the mac back up with it and then do a full restore using my up to date time machine backups? am i missing something with that method? is that too simple?
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cheers
peter t

Crows2012 wrote:
1) there is no way to make a BOOTABLE clone using disk utility or time machine whatsoever, right? DU will only allow me to make clones and Recovery HD essentially allows me to restore the system (ie software) AFTER booting up?
Correct with respect to TM; all you get is a copy of the Recovery HD.
Disk Utility will make a bootable clone, but there are downsides. First, it can only do a whole copy; unlike a specialized cloning app, it won't copy just what's new or changed, so takes a long time. Second, as I understand it, it won't copy to a smaller volume, even if there's plenty of free space on the internal. For example, if you have a 1 TB internal with only 400 GB on it, DU won't copy it to a 500 GB drive. I may be wrong, but I've seen that posted here by folks who seem to know.
does file b here mean aliases of file b in each backup?
It acts sorta like that, but no.
There's one copy of the actual file, but two hard links to it, one in each folder. The file actually "belongs" to both folders at the same time! The good part of that is, if you delete either backup folder, the other one remains intact. The downside is, how the heck do you count the size of each folder accurately?
that was a great read to understand TM workings and attain some level of piece of mind re my question of incremental v differential backups
It is a bit hard to get your head around! I've been revising and editing that for several years trying to make it clear.
And remember, this only applies to TM as far as I know, at least for consumer-level backup apps.
While it may be possible to boot your computer to an external hard drive, Western Digital does not provide technical support for booting your computer using an external hard drive. If you intend to make a copy of your boot drive, or install your operating system, please use a second internal drive (EIDE or Serial ATA), rather than an external drive.
Yup. WD doesn't exactly have a good reputation for support.
i guess i'll trial CCC or SD and see what happens with the drives that i have re BOOTABILITY
I use CCC myself -- it's a great product with great support.
I downloaded SD a couple of times, but never got around to experimenting with it. Lots of folks swear by it, and say it also has excellent support. To a large degree, it just seems to be a matter of which approach and GUI you prefer, but CCC does allow "archiving" of changed and deleted stuff (differently from TM), and can copy Recovery HDs. I don't think SD does either, but it may have other advantages.
4) and, i think one final question, and a simple/naive one at that.....if my internal hard drive physically collapses then what are the benefits of that bootable clone v not having one?
You can start up from the clone and run normally (but likely a bit more slowly), although you probably won't be as up-to-date as you would after restoring to a new or repaired internal, or an external, from TM. The reason is, running a clone backup, even an incremental one, takes much longer and far more CPU than one of TM's quick incrementals, which it will do hourly if you let it. Few folks using a clone for an OSX drive do it more than once per day, many only once a week.
The downside is, if you run from the clone, you no longer have a backup -- the clone has the only copy of your stuff. That's one reason many folks who use only a cloning app have two (or more) externals with them.
Apart from (obviously) being able to start up immediately to do whatever i wanted to do at the time, after i replace the hard drive (if that was to be the case) are there further expenses or much inconvenience suffered due to not having a bootable drive in getting things all sorted internally on the mac? what is the process in that regard, generally speaking
Just clone the external to the new internal, and you're back in business.
thanks heaps for your time to answer these and previous questions and to build up my understanding of these topics
You're quite welcome.

How to set up set which NIC card to use for multicast?..

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 Thanks for helping,
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 Kumar Allamraju <[email protected]> wrote:
 ><!doctype html public "-//w3c//dtd html 4.0 transitional//en">
 ><html>
 >You should be able to do it via console in 6.1
 > Not sure if it was added in 6.0
 >For 6.0 you can set this via command line
 > java -Dweblogic.interfaceAddress=<addr>
 >You need 6.0 SP2 RP1
 >--
 > Kumar
 >Nilesh Shah wrote:
 ><blockquote TYPE=CITE>I just downloaded Rolling Patch 1 for WLS6.0SP2.
 > While reading the README file it says
 > " ISSUE 42518: Provided a way to set which NIC card to use for multicast
 >traffic
 > "..
 >Can anyone tell me how to set this?. on my WebApplication server it
 >has two NIC
 > cards and I want to use the NICcard which is being used to talk to
 >internal network
 > for multicast messages.
 >One more thing,
 >Can anyone one tell how to search for bugs (ISSUES) in weblogic. I
 >am
 >looking
 > place where I enter ISSUE number and should get the detailed description
 >of bug/issue
 > etc..
 >Thanks for helping,
 >Nilesh</blockquote>
 ></html>
 >

How does Disk Utility estimate completion time?

I'm sending an external drive back to the vendor for troubleshooting, and want to make it more difficult for a curious tech to examine the data there. So I told Disk Utility to Zero Out Data and Erase Free Space. The drive was just initialized, so it's all free space. Did I mention it's a 2 TB FW800 drive?
Anyway, when I started this yesterday, the time estimate was 14 hours. (No hissing please.) Sleep is only enabled for the display: computer and HDs are set to "Never" sleep.
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Grant Bennet-Alder wrote:
The estimate is based on how long it already took to do how many blocks, and how many blocks are left to do. If you told it to overwrite 35 times, it will be a long, long time before it completes.
The estimate is made grossly large by the presence of Bad Blocks that need to be Read during the test (not the case with Erase and Write Zeroes).
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Thanks, Grant.
If I read your reply correctly, Erase and Zero Out free space shouldn't elongate the process, because there's no read occurring.
The drive will not be Mounted while Disk Utility works on it, so it will not be on the Desktop. But ask Apple System Profiler \[ About this Mac > More Info > Serial ATA ] if the drive is still THERE . If it cannot be seen, you have your answer -- the drive dropped out of sight while being tested -- Bad Drive.
Well, now I am confused. It's a FW800 drive. It's on the Desktop. And it appears under FireWire in System Profiler. AND Disk Utility shows a mount point. But the Unmount and Eject buttons are grayed out.
Will the drive be mounted if it fails to respond to Disk Utility? That doesn't seem to make sense.
How do I determine its status? It appears to be stuck at "1 day, 5 hours" but it'll take an hour for that to change. I think it's been that long since I first noticed the time.
Harv

How does the query decide which Infoprovider to fetch data from

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How did Disk Utility make my external drive undetectable?

Greetings all,
It all started when I dropped a running external hard drive (WD My Book Essential) onto the floor.
I immediately plugged the disconnected USB back into the drive and waited..
The first pop-up said the drive could not be read so I re-plugged it.
It worked and I could read files but it took a long time just to show those files in finder.
There was obviously a problem with the drive so I opened up Disk Utility and clicked Verify Disk.
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After a long time of waiting it still remained at zero so I had to force close finder and restart.
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Any help regarding this issue will be appreciated.
2012-11-14 16:47:00 +0800: Disk Utility started.
2012-11-14 16:49:29 +0800: Verifying volume “My Book”
2012-11-14 16:49:29 +0800: Starting verification tool:
2012-11-14 16:53:40 +0800: Checking file system2012-11-14 16:53:40 +0800: Checking Volume /dev/disk1s1...
2012-11-14 16:53:58 +0800: This is not an NTFS volume.
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2012-11-14 16:54:39 +0800: Disk Utility stopped verifying “disk1s1”: This disk needs to be repaired. Click Repair Disk.
2012-11-14 16:55:09 +0800:
2012-11-14 16:55:22 +0800: Verify and Repair volume “disk1s1”
2012-11-14 16:55:22 +0800: Starting repair tool:
2012-11-14 16:55:22 +0800: Checking file system2012-11-14 16:55:22 +0800: Checking volume.
2012-11-14 16:55:22 +0800: Checking main boot region.
2012-11-14 16:55:35 +0800: Volume repair complete.2012-11-14 16:55:35 +0800: Updating boot support partitions for the volume as required.2012-11-14 16:56:14 +0800: Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.2012-11-14 16:56:14 +0800:
2012-11-14 16:56:14 +0800: Disk Utility stopped repairing “disk1s1”: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
2012-11-14 16:56:44 +0800:
2012-11-14 16:58:08 +0800: Disk Utility started.
2012-11-14 16:58:14 +0800: Eject of “WD My Book 1140 Media” succeeded
2012-11-14 17:04:21 +0800: Eject of “WD My Book 1140 Media” failed

In a word, it appears that the "dropped" external drive is physically damaged internally, and so can't run "Repair Disk" properly. Time for a new external hard drive.
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HT3275 How do you Format the external hard drive been used for time machine?

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Thanks Geremy

ON an external hard drive.. that is easy.. just open disk utility and reformat it. Make sure you use Mac Extended Journeled. (HFS+)

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I'm a long-time user of Profimail on Symbian devices. Now that I've gotten used to the new keyboard on Belle FP2 I'm finding it frustrating to use the pre-FP2 keyboard that Profimail presents.
I asked the developers if they could update Profimail to use the FP2 keyboard and this was their response:
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HT201250 How do I find out what portable drive was the drive I used for Time Machine Backup?

Hi, I have 10.7.4 and need to figure out what drive I was using for Time Machine Backup. I have three drives and I have connected each of them to my macbook pro, but I get an error, "Time Machine Error, The backup disk is not available" when I hit the time machine icon on the top of the screen and the "backup delayed" prompt. If I try Back up Now I get message, "Time Machine could not complete the backup. Back up disk is not available." I am trying to figure out what the time machine back up would actually look like as a file on the drives but I don't see a folder/file name Time Machine. If I enter Time Machine I can see in the far right column, in purple, the last back up date (Sept. 12, 2012), but when I hit it nothing happens. In the Time Machine preference box the select disk has, in red and to the right, "Delayed" with an "i" within a circle, and the option indicates, "Next backup: when disk is connected."
I know I have a years worth of backups on one of the three drives, but I can't figure out how the heck to find them or how to determine what was the last drive I used for the backups within Time Machine. Help please.

Hi, I have 10.7.4 and need to figure out what drive I was using for Time Machine Backup. I have three drives and I have connected each of them to my macbook pro, but I get an error, "Time Machine Error, The backup disk is not available" when I hit the time machine icon on the top of the screen and the "backup delayed" prompt. If I try Back up Now I get message, "Time Machine could not complete the backup. Back up disk is not available." I am trying to figure out what the time machine back up would actually look like as a file on the drives but I don't see a folder/file name Time Machine. If I enter Time Machine I can see in the far right column, in purple, the last back up date (Sept. 12, 2012), but when I hit it nothing happens. In the Time Machine preference box the select disk has, in red and to the right, "Delayed" with an "i" within a circle, and the option indicates, "Next backup: when disk is connected."
I know I have a years worth of backups on one of the three drives, but I can't figure out how the heck to find them or how to determine what was the last drive I used for the backups within Time Machine. Help please.

Does disk utility repair delete any files on external hard drive?

Does disk utility repair disk delete any files on the external hard drive?

diskutil list
Last login: Sun Dec 21 16:07:46 on console
Justins-MacBook-Pro:~ justinmontoya$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *750.2 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
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   0:                  Apple_HFS Macintosh HD           *748.9 GB   disk1
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                                 4A646B29-3794-4A34-AC98-C0FB505D402B
                                 Unlocked Encrypted
/dev/disk2
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   0:     FDisk_partition_scheme                        *500.1 GB   disk2
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TS1338 I have 4 Trojan Horse viruses on my external drive I use for Time Machine. My MacBook Pro hard drive is clean. I have eased the external drive 3 times using Disk Utility and it still has the 4 Trojan Horse viruses. How do I get rid of them. Wayne

I have 4 Trojan Horse viruses on my external drive I use for Time Machine. My MacBook Pro hard drive is clean. I have eased the external drive 3 times using Disk Utility and it still has the 4 Trojan Horse viruses. How do I get rid of them. I am using 10.8.3 Wayne

ksu62 wrote:
The infection names are: classload.jar-719ef6a5.zip
                                          classload.jar-5db452le31.zip
                                          ar3.jar-6ce3b2f-45l483f.zip
                                          classload.jar-lef99412-63bsd3fl.zip
Those look alot like file names and not infection names. I don't find any reference to anything like that on Norton or VirusTotal. Since you said these were Trojans, I would expect to see "Trojan" as part of the infection name.
".jar" files are executable Java applets. The random alpha-numerics would seem to indicate a cache file, likely from a browser with Java enabled. And we all know what ".zip" means.
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Disk Utility not finding Hard Drives after Updates

Howdy;
Updated my B&W G3 to 10.4.4 and itunes 6.0.2. After update and restart, ran Disk Utility (DU), which seem to just get into a loop "Gathering disk data". Force quit DU and tried running from Tiger DVD, but similar story.
I have done a little research and there has been many problems with DU linked to itunes 6.0.2 update, but not quite the same (no B&W G3 w/10.4.4 and different DU hang point).
I followed: http://discussions.apple.com/message.jspa?messageID=1505537#1505537
and even tried moving iTunes to desktop; trashing several iTunes.pkg files; restarting, all to no avail.
Any additional suggestions out there?
Dual 2.5 G5; Mac min; B&W G3 Mac OS X (10.4.4)

I doubt that any jumpers are needed, since this is the only (master) drive in the system. WD's site has pretty good info on this. Verify for yourself however.
Also, from their site:
How to partition and format an internal slave drive or an external drive in a Mac OS X (all versions).
Answer
In Mac OS X, you can use the built in Disk Utility to partition and initialize the drive so it will appear on the desktop.
1. Open the main drive (the drive that contains the operating system).
2. Open the Applications folder.
3. Open the Utilities folder.
4. Select Disk Utility.
5. The drives are displayed on the left side of the window. Click on the drive that you wish to partition (the top drive listing for the hard drive that you want to work with).
6. Once the drive is selected click on Partition.
7. Click on the Options button to select the partitioning scheme.
8. Click on Apple Partitioning Scheme or Apple Partitioning Map and then click on the OK button.
9. You will see several options for setting up the drive. Once you have selected the number of partitions, the format type you want, and a volume label, click the Partition button.
10. Following the completion of this process, the drive will appear on the desktop.
Joe

BootCamp nor' Disk Utility will Partition my Drive.

Alright, So Im back again, And this time I have a totally different topic.
Today I tried to Partition my drive to add another OS, to be specific, Windows 7 (Don't hate me! :P)
The first step I took was using BootCamp SINCE, It is for windows installation on Mac OS X.
WELL, I tried partition and BootCamp wouldn't let me, The Boot Camp Assistant will usually get stuck at the "Partitioning Disk..." stage, Or sometime it will say. "Partitioning Disk..." for about 5 minutes then a warning message will pop up saying, "Verification failed. This disk could not be partitioned. Use disk utility to repair this disk."
I hit okay, then go to Disk Utility, And try to partition my disk from there, I will select how big of a partition I want leaving about 6 gigs on my main partition. I hit "Apply" and then it starts to partition, but the only thing it does is, "Modifying the partition map" for about 5 minutes and then I get a warning message saying, "Partition failed. Partition failed with the error: Filesystem verify or repair failed." Im not really sure what this means, but after this, I try to Verify and Repair my disk. It does the "Verifying" stage for about 8 minutes and then tells me "First Aid Failed. Disk Utility stopped verifying "Macintosh HD" because the following error was encountered: Filesystem verify or repair failed." In the "Details" box, this is what it says,
"Verifying volume “Macintosh HD”
Performing live verification.
Checking Journaled HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Checking multi-linked files.
Checking Catalog hierarchy.
Checking Extended Attributes file.
Checking volume bitmap.
Checking volume information.
Invalid volume file count
(It should be 410899 instead of 410900)
Invalid volume directory count
(It should be 117223 instead of 117222)
The volume Macintosh HD needs to be repaired.
Error: Filesystem verify or repair failed."
Can someone please help me out here, All I want to do is make one stinkin partition for Windows 7! Whats going on here?!

If you are going to repair a startup volume then you must do this:
Repairing the Hard Drive and Permissions
Boot from your OS X 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 Installer menu (Utilities menu for Tiger and Leopard.) 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. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger, and 4.1 for Leopard) and/or TechTool Pro (4.6.1 for Leopard) 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.
Your error suggests some major defect with the hard drive. If it cannot be repaired you will have to re-partition the drive. This will erase everything on the drive, so be sure to backup first.
Also, you cannot install Windows on a partition your create with Disk Utility. You must use Boot Camp Assistant on a drive with a single partition/volume using GUID partition map and formatted Mac OS Extended, Journaled.

How does disk utility decide which optical drive to use for burn?

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