Hello, I created a 4.5T RAID10 with internal bitmap out of 3 1.5T disks on a Debian 2.6.28-1-686-bigmem kernel: # mdadm --create -l raid10 -n 6 -c 512 -b internal -a md /dev/md7 /dev/sdc1 missing /dev/sdd1 missing /dev/sde1 missing and I get a strange inconsistency between the on-disk and the in-kernel bitmap representation: [202617.869531] md: bind<sdc1> [202617.888998] md: bind<sdd1> [202617.908895] md: bind<sde1> [202617.917307] md: md7: raid array is not clean -- starting background reconstruction [202619.527127] md: raid10 personality registered for level 10 [202619.544588] raid10: raid set md7 active with 3 out of 6 devices [202619.563536] md7: bitmap file is out of date (0 < 1) -- forcing full recovery [202619.584919] md7: bitmap file is out of date, doing full recovery [202619.655867] md7: bitmap initialized from disk: read 1/1 pages, set 6131 bits [202619.677268] created bitmap (3 pages) for device md7 [202619.714033] md7: detected capacity change from 0 to 4500896612352 [202619.732554] md7: unknown partition table [202781.236591] md: resync of RAID array md7 [202781.248610] md: minimum _guaranteed_ speed: 1000 KB/sec/disk. [202781.266343] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for resync. [202781.294735] md: using 128k window, over a total of 4395406848 blocks. [202781.336808] md: md7: resync done. [202781.347708] md7: invalid bitmap page request: 3 (> 2) [202781.363228] md7: invalid bitmap page request: 3 (> 2) [202781.378637] md7: invalid bitmap page request: 3 (> 2) [202781.394286] md7: invalid bitmap page request: 3 (> 2) [202781.409704] md7: invalid bitmap page request: 3 (> 2) ...lots more of them... [202781.832046] md7: invalid bitmap page request: 129 (> 2) [202781.832047] md7: invalid bitmap page request: 129 (> 2) [202781.832048] md7: invalid bitmap page request: 129 (> 2) [202781.832049] md7: invalid bitmap page request: 129 (> 2) [202781.832050] md7: invalid bitmap page request: 129 (> 2) ...lots more of them... [202781.832095] md7: invalid bitmap page request: 130 (> 2) [202781.832096] md7: invalid bitmap page request: 130 (> 2) [202781.832097] md7: invalid bitmap page request: 130 (> 2) [202781.832097] md7: invalid bitmap page request: 130 (> 2) [202781.832098] md7: invalid bitmap page request: 130 (> 2) ...lots more of them... While mdadm -X on every component shows a reasonable bitmap with a 16M chunk size and 268275 chunks, the kernel seems to assume there are only 6131 chunks and initializes 3 instead of 130 pages. The same happens when adding the bitmap with -G -b internal to an existing array. I don't know if this problem belongs to the array size (i.e. some 32bit boundary problem) or to raid10 in general. regards Mario -- <snupidity> bjmg: ja, logik ist mein fachgebiet. das liegt im gen <uepsie> in welchem? <snupidity> im zweiten X -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
