in past, it work automqaticly. Now not. The same disc, the same nas
I made it by cfdisc - partition. When try to add by mdadm - disc to small (hmm) - the same disc
I made it by fdisc, enter correct sectors - work
mdadm -add - works
But it doesnt work automaticly (geometry problem ?). Difference - I add totaly clean drive: dd /dev/zero of=/dev/drive bs=1M count=100 before add disc to nas
We have sometimes seen md0 or md1 not sync automatically. I think in most cases that's related to a disk failure (bad sector somewhere?).
I'm not saying that's happened here - though it might be worth checking the smart stats. The -x option will give you some additional info about cached errors.
I don't thnk you can make a partition properly aligned for md0 with cfdisk. The only tool I've found that will is parted.
volume_util -O will optimize the swap parttiton RAID, and will (at least when I've used it) also trigger expanding md0. I don't know if it will create the OS partition on the drive if it doesn't already exist, though. But it's worth a try.
volume_util is a handy command line tool that Negear has put on the system. I assume that the GUI calls it for various functions, such as this one.
I don't thnk you can make a partition properly aligned for md0 with cfdisk. The only tool I've found that will is parted.
<answer>
fdisk. Could be given sector - beginieng and end
Parted is good tool too. But I use for all disc, multi partition. There was 2 partitions (for md0, md127), so I did it by fdisk
</answer>
volume_util -O will optimize the swap parttiton RAID, and will (at least when I've used it) also trigger expanding md0. I don't know if it will create the OS partition on the drive if it doesn't already exist, though. But it's worth a try.
<answer> /dev/md0 is for / (root) partition
partition was on /dev/md0
but it was 1 disc array
I add drive/partition
mdadm -add /dev/md0 /dev/sdb1
and grow array
mdadm --grow --raid-devices=2 /dev/md0
and it start sycing
volume_util - I don't know this utility. I'll check
</answer>
volume_util is a handy command line tool that Negear has put on the system. I assume that the GUI calls it for various functions, such as this one.
<answer>
could be, I don't know. I used "by hand"
It not start automaticly. I don't know why. Wrong first sector ? So there was free space on the begining of drive. So I made partition on this free space. By fdisc. cfdisk doesn't work
fdisk (and I believe cfdisk) will normally refuse to start a partition at sector 64, which is what you need for the NAS md0. I'm surprised you got it to do it.
Of course, I don't think I've ever tried to create parttion 1 last. Maybe it will let you in that case.
parted will complain that the partition isn't "properly aligned", but will let you do it.
Polecenie (m wyświetla pomoc): p Dysk /dev/loop0: 3,8 GiB, bajtów: 4096000000, sektorów: 8000000 Jednostki: sektorów, czyli 1 * 512 = 512 bajtów Rozmiar sektora (logiczny/fizyczny) w bajtach: 512 / 512 Rozmiar we/wy (minimalny/optymalny) w bajtach: 512 / 512 Typ etykiety dysku: dos Identyfikator dysku: 0x01902dc6
Polecenie (m wyświetla pomoc): n Typ partycji p główna (głównych 0, rozszerzonych 0, wolnych 4) e rozszerzona (kontener na partycje logiczne) Wybór (domyślnie p): p Numer partycji (1-4, domyślnie 1): 1 Pierwszy sektor (63-7999999, domyślnie 63): 64 Ostatni sektor, +sektorów lub +rozmiar{K,M,G,T,P} (64-7999999, domyślnie 7999999):
Utworzono nową partycję 1 typu 'Linux' o rozmiarze 3,8 GiB.
Polecenie (m wyświetla pomoc): p Dysk /dev/loop0: 3,8 GiB, bajtów: 4096000000, sektorów: 8000000 Geometria: głowic: 255, sektorów/ścieżkę: 63, cylindrów: 497 Jednostki: sektorów, czyli 1 * 512 = 512 bajtów Rozmiar sektora (logiczny/fizyczny) w bajtach: 512 / 512 Rozmiar we/wy (minimalny/optymalny) w bajtach: 512 / 512 Typ etykiety dysku: dos Identyfikator dysku: 0x01902dc6
Urządzenie Rozruch Początek Koniec Sektory Rozmiar Id Typ /dev/loop0p1 64 7999999 7999936 3,8G 83 Linux
Polecenie (m wyświetla pomoc):
how about first sector... ?
But fdisk allow to enter first sector
Could be changed by change number of cylinders, heads etc
