© 2004
Canonical Ltd.
•
Terms of use
•
Data privacy
•
Contact Launchpad Support
•
Blog
•
Careers
•
System status
•
1b1ed1a
(Get the code!)
It's been 2 years, 8 months, 20 days since Danny Wood last posted in this thread. Just quickly, really appreciate your efforts attempting to fix this problem, without even having the hardware. That's dedicated.
I've just set up a 2x4TB RAID1 mirror in Windows, which of course leads me to this thread. Good news, with a patch to Danny's patch, my raid mirror detects and appears to be working. My pre-existing 1TB raid1, continues to function as it did before.
I will re-upload the patch (with a different patch index number to avoid confusion with the original), which includes my 1 line fix, that allows the 4TB mirror to detect, activate and work as expected.
- unsigned pdc_sectors_max = di->sectors - div_up(
+ uint64_t pdc_sectors_max = di->sectors - div_up(
pdc_sectors_max was 32bit, and overflowing, which caused the pdc_read_metadata function to fail to find the metadata offset from the end of the disk.
I thought I might also use the opportunity to clear up some confusion with regards to some people having difficulty finding a partition table or failing to mount their existing raid setups.
AMD RAIDXpert (pdc format) allows you to choose a logical sector size. 512, 1024, 2048 or 4096 bytes. In Windows, this configures the drives logical sector size to match what you chose at the raids creation time. This is presumably contained within the metadata.
Page 106 of the user manual alludes to why you might want to choose a non default sector size, as it affects the maximum LD migration size. Linked for convenience:
https:/
dmraid seems to only support 512 byte logical sectors. If we could read the logical sector size from the metadata, couldn't we then just set the logical sector size at the device mapper node's creation time? This way the partition table should line up when you use f(g)disk/gparted etc.
In the meantime, just make sure you choose the default 512 byte logical sectors, if you want to share RAID arrays between Windows and Linux.