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TOPIC: volume rebuild - insufficient work space to continue

volume rebuild - insufficient work space to continue 28 Aug 2017 22:13 #8510

hi,
I got failed to rebuild the volume:

MacBook Pro 13" 2017 4 Thunderbolt 3 ports (in short, the newest, touch bar model)
Sierra 10.12.5
SSD two partitions:
A: 200GB (66GB free) startup volume
B: 32GB (30GB free)

For B, rebuild succeeds.
For A, fails with "Rebuild Error Encountered Insufficient Work Space To Continue"
Partition repair, permission repair done, OK.

How should I do?

(I attached "save as" report. but seems don't. )
Attachments:
Last Edit: 28 Aug 2017 22:25 by Ogawa.
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volume rebuild - insufficient work space to continue 28 Aug 2017 22:27 #8511

The correct interpretation of the "insufficient workspace to continue" error message is that there is not enough free, contiguous disk space on the volume to allow the new Catalog B-Tree and Extents B-Tree disk directory files to be written in a single piece (called an "extent") each. The total amount of free space on the volume does not matter. The size of the eDrive does not affect this error.

The amount of free, contiguous (all in one piece) disk space is shown in the Volume Optimization preview window, as "largest". There are three ways to create more disk space that is both free and contiguous. You could optimize the volume, using the File Optimization and the the Volume Optimization (requires restarting from another volume with TechTool Pro on it). Or, you could Optimize Using the Cloning Tool. Or, you could temporarily remove some files that you suspect are already in one piece, and at least as large as the new disk directory files need to be.

I suggest you change your screen name to something other than an email address. These forums are indexed by Google, and you might get a lot of spam. Use the My Account link at the top of the page, and then the Account Information link. Changing your screen name retroactively updates the screen name that appears in all of your postings.
MicroMat Inc
Makers of TechTool
Last Edit: 28 Aug 2017 22:27 by micromattech3.
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volume rebuild - insufficient work space to continue 28 Aug 2017 22:37 #8512

where can I change the name?
I don't intend to show my email address and I walk around the setting but there seems none to control it.
user id (?) is fixed, I put name. I set "hide" email in forum setting.
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volume rebuild - insufficient work space to continue 28 Aug 2017 22:42 #8513

The screen name is in the username field, at the upper right of the Account Information window.

Do not use the File Optimization or Volume Optimization to create more free, contiguous disk space if the Volume Structures test shows any errors in the disk directory. Running an optimizer on a volume with disk directory errors can make matters worse.
MicroMat Inc
Makers of TechTool
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volume rebuild - insufficient work space to continue 28 Aug 2017 22:47 #8514

I can't change this field (green one).
why?
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volume rebuild - insufficient work space to continue 28 Aug 2017 22:56 #8515

thanks.

disk Checks are OK.
btw, Is it OK to optimize on SSD? Techtools pops up warning dialog when volume optimization "preview optimization" button is clicked.
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volume rebuild - insufficient work space to continue 28 Aug 2017 22:58 #8516

I do not recognize the window shown in your screen capture.

Click the My Account link at the top of the main forums page. Then click the Account Information link at the top of the new window. The page has "customer details" arranged like this:

Email username
Password Confirm Pasword

Company name
First Name Last Name
Address 1 Address 2
City Country
State Zip/Postal Code

Then product details.
MicroMat Inc
Makers of TechTool
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volume rebuild - insufficient work space to continue 28 Aug 2017 23:00 #8517

No, you should not optimize an SSD. They use wear leveling to try to even out the wear on the sectors.
MicroMat Inc
Makers of TechTool
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volume rebuild - insufficient work space to continue 28 Aug 2017 23:09 #8518

Oh, thanks.
I did it.

(I click "Welcom, xxx" on this page. then "Edit" ... that was the shot I took)
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volume rebuild - insufficient work space to continue 28 Aug 2017 23:11 #8519

You are welcome, and thanks for letting me know where your screen capture was made.
MicroMat Inc
Makers of TechTool
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volume rebuild - insufficient work space to continue 28 Aug 2017 23:23 #8520

give 12h or so.
I now must leave here.
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volume rebuild - insufficient work space to continue 28 Aug 2017 23:23 #8521

There is no reason to rebuild the disk directory of a volume on an SSD if the volume has no disk directory errors.
MicroMat Inc
Makers of TechTool
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The following user(s) said Thank You: Ogawa

volume rebuild - insufficient work space to continue 29 Aug 2017 22:28 #8524

Thanks.

first, I must correct this: my macbook pro has fusion drive, not SSD.

Then, is it meaningfull to rebuild a fusion drive?


secondly,
I finally did the rebuild the volume.

I had wondered why no sufficient continuous extent space (318MB free contiguous free space) despite of 66 GB free space.
I found a 4GB (!) salvaged file in Lost+Found folder! I don't know why that happened.
(according its time stamp, this was made on my previous MacBook Air and passed over my new MacBook pro via Time Machine data transfer when the initial setup.)

After removing it, I could be able to do "Volume Rebuild".

thank you for your support!
Attachments:
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volume rebuild - insufficient work space to continue 29 Aug 2017 22:46 #8525

You are welcome, thanks for the clarification.

The Fusion drive has disk directory files on both the SSD volume and the hard drive volume. If you rebuild the disk directory of the Fusion drive, both disk directories get rebuilt. That gets you very slightly faster access via the Finder for files on the rotational part, because the new disk directory entries are re-ordered. It also causes some wear to the SSD part, because all writing to an SSD causes wear. I would not bother to rebuild the disk directory unless it had errors diagnosed by either Disk Utility or the Volume Structures test.

You should always make a backup of a drive before rebuilding its disk directory.
MicroMat Inc
Makers of TechTool
Last Edit: 29 Aug 2017 22:47 by micromattech3.
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