So by default, the /dev/md0 device has Rd/Wr permissions (set during mdadm --create ... cmd...)...is that correct? Thanks. On Thu, Sep 17, 2009 at 2:43 PM, Majed B. <majedb@xxxxxxxxx> wrote: > /dev/md0 is not mounted and it doesn't have a filesystem because you > didn't format the device after creating it. > > After you have created the filesystem, run: mkfs.ntfs --fast /dev/md0 > > After that, you can mount it: mount /dev/md0 /mnt/windows > > On Fri, Sep 18, 2009 at 12:39 AM, Linux Raid Study > <linuxraid.study@xxxxxxxxx> wrote: >> Hi Robin: >> >> I use mdadm cmd to create Raid5 device and did following: >> >> #mdadm --create /dev/md0 --level=5 --assume-clean --raid-devices=4 >> /dev/sda /dev/sdb /dev/sdc /dev/sdd >> >> #mdadm -w /dev/md0 >> mdadm: failed to set writable for /dev/md0: Device or resource busy >> >> ~ # mount >> none on /proc type proc (rw) >> none on /dev/shm type tmpfs (rw) >> none on /dev/pts type devpts (rw,mode=600) >> none on /sys type sysfs (rw) >> none on /mnth type hugetlbfs (rw) >> >> As u would notice, /dev/md0 is yet mounted...not sure why the above error.... >> >> Thanks for ur help! >> >> On Thu, Sep 17, 2009 at 1:02 PM, Robin Hill <robin@xxxxxxxxxxxxxxx> wrote: >>> On Thu Sep 17, 2009 at 12:23:22PM -0700, Linux Raid Study wrote: >>> >>>> Hello: >>>> >>>> I have to bundle 4 disks as a Raid5 device, export it to iSCSI >>>> initiators and format it as NTFS. >>>> >>>> What is better: >>>> - Format individual disks as NTFS and then bundle them as Raid5 device >>>> and export to initiator PCs >>>> - Or bundle the disks first as Raid5 dev, export them and then format >>>> the /dev/md0 device as NTFS >>>> >>>> I get "write-protected" errors when I do the second option. Does it >>>> mean formatting of raid5 device is not allowed? >>>> Does Raid5 inherit the NTFS properties of individual disks (first option)? >>>> >>> I don't see your first option working at all. When you bundle the >>> drives together, the resulting device will have totally scrambled the >>> underlying NTFS filesystems. >>> >>> The second option is how md RAID is supposed to work - you bundle >>> together the disks into a single array, then format that. Where are you >>> getting the "write-protected" errors? Are you trying to format the >>> exported iSCSI device from a remote system? Certainly the RAID device >>> can be formatted directly, but I've no idea how the iSCSI affects >>> things. >>> >>> HTH, >>> Robin >>> -- >>> ___ >>> ( ' } | Robin Hill <robin@xxxxxxxxxxxxxxx> | >>> / / ) | Little Jim says .... | >>> // !! | "He fallen in de water !!" | >>> >> -- >> 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 >> > > > > -- > Majed B. > -- 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
