Search found 8 matches

by winguru
Mon May 20, 2019 5:34 pm
Forum: RAID Recovery
Topic: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)
Replies: 14
Views: 69907

Re: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)

Well, after much trial and error, it looks like I may have stumbled across the correct settings. Perhaps a combination of blind luck and getting dirty with the MBP/GPT and partition details, verifying expected LBA sectors match virtual RAID data, etc. I was able to mount the HFS+ partition without ...
by winguru
Mon May 20, 2019 10:01 am
Forum: RAID Recovery
Topic: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)
Replies: 14
Views: 69907

Re: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)

Thanks for the heads up!

I tested the new version (8.10.173981) and found that the raid configuration looks better. I am able to delete the default 4-block sequences and create new 3-block sequences as expected. So that part looks correct now, as shown below:
RAID Configuration - Version 8.10 ...
by winguru
Mon Apr 29, 2019 9:52 am
Forum: RAID Recovery
Topic: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)
Replies: 14
Views: 69907

Re: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)

For what it's worth, I'll also share the code I wrote to create custom RAID-5 definitions for different parity delays. It doesn't generate the complete XML file, just the "table" and "sequences" sections that define the stripe pattern.

https://repl.it/@winguru/R-Studio-Apple-RAID-5-XML-Definition ...
by winguru
Sun Apr 28, 2019 2:16 pm
Forum: RAID Recovery
Topic: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)
Replies: 14
Views: 69907

Re: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)

I have looked over the exported configuration of the custom RAID-5 configuration I made (as per your advanced RAID configuration guidance). I included my exported XML file as an attachment to my first message.

The key components of that file are as follows:
<Table>
<Block id="A1" sequence="1 ...
by winguru
Sat Apr 27, 2019 12:44 pm
Forum: RAID Recovery
Topic: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)
Replies: 14
Views: 69907

Re: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)

No, there were no errors or warnings about unreadable sectors.

If I pick the built-in RAID-5 Right Symmetric configuration, this is what I see for the RAID Consistency Check:
RAID Consistency Check - 3.png
Thanks!
by winguru
Sat Apr 27, 2019 8:53 am
Forum: RAID Recovery
Topic: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)
Replies: 14
Views: 69907

Re: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)

To hopefully clarify, I looked more closely and I believe I misspoke when I said 1/5 (20%) of the blocks were "not checked". As the following screenshot shows, there are 12 checked blocks followed by 4 unchecked blocks. That's 16 total in a sequence and 4/16 or 1/4 (25%) are not checked, not 20 ...
by winguru
Fri Apr 26, 2019 10:27 pm
Forum: RAID Recovery
Topic: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)
Replies: 14
Views: 69907

Re: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)

Yes, thank you for that reference. That (among others) is what I was going on and one of the reasons I purchased your software.

My issue seems to be (at least partly) that when I try to check my RAID consistency, 1/5 of the blocks are marked as "not checked".

I'll include some screenshots if that ...
by winguru
Thu Apr 25, 2019 4:27 pm
Forum: RAID Recovery
Topic: Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)
Replies: 14
Views: 69907

Rebuilding RAID from Apple MacPro Classic 4.1 Hardware RAID-5 (4 drives)

Greetings,

I am attempting to rebuild my RAID-5 environment from my Apple MacPro Classic. I have four (4) 2 TB drives in a hardware RAID-5 configuration. I accidentally pulled the wrong drive when investigating a soft-failure on another drive, so I ended up taking the whole array offline. Long ...