April 23, 200917 yr I set up unRAID a few weeks back and now that it has proven itself, I would like to start using my old primary storage system (Drobo) to back up the unRAID box. My theory when starting out was that I could plug Drobo in via USB and mount it as I would any other external NTFS formatted drive. Of course I tested this with a standard drive and it worked great; however I get errors when trying to do the same thing with the Drobo. Below are the commands I have issued and what the responses are: root@Tower:/mnt# mount -r -t ntfs-3g -o umask=111,dmask=000 /dev/sdg1 /mnt/drobo/ NTFS signature is missing. Failed to mount '/dev/sdg1': Invalid argument The device '/dev/sdg1' doesn't seem to have a valid NTFS. Maybe the wrong device is used? Or the whole disk instead of a partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around? root@Tower:/mnt# mount -r -t ntfs-3g -o umask=111,dmask=000 /dev/sdg /mnt/drobo/ NTFS signature is missing. Failed to mount '/dev/sdg': Invalid argument The device '/dev/sdg' doesn't seem to have a valid NTFS. Maybe the wrong device is used? Or the whole disk instead of a partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around? root@Tower:/mnt# After looking around the web for a bit, I ran into this forum post on the ntfs-3g site (http://forum.ntfs-3g.org/viewtopic.php?f=2&t=943), which looks like the problem was resolved by building the kernel with "EFI GUID Partition Support". Does anyone know if unRAID has this feature in the kernel, or how I can check? It looks like several Mac users with external drives formatted as HFS+ run into the same problem. Is this something Tom could add to 4.5?
April 23, 200917 yr I set up unRAID a few weeks back and now that it has proven itself, I would like to start using my old primary storage system (Drobo) to back up the unRAID box. My theory when starting out was that I could plug Drobo in via USB and mount it as I would any other external NTFS formatted drive. Of course I tested this with a standard drive and it worked great; however I get errors when trying to do the same thing with the Drobo. Below are the commands I have issued and what the responses are: root@Tower:/mnt# mount -r -t ntfs-3g -o umask=111,dmask=000 /dev/sdg1 /mnt/drobo/ NTFS signature is missing. Failed to mount '/dev/sdg1': Invalid argument The device '/dev/sdg1' doesn't seem to have a valid NTFS. Maybe the wrong device is used? Or the whole disk instead of a partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around? root@Tower:/mnt# mount -r -t ntfs-3g -o umask=111,dmask=000 /dev/sdg /mnt/drobo/ NTFS signature is missing. Failed to mount '/dev/sdg': Invalid argument The device '/dev/sdg' doesn't seem to have a valid NTFS. Maybe the wrong device is used? Or the whole disk instead of a partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around? root@Tower:/mnt# After looking around the web for a bit, I ran into this forum post on the ntfs-3g site (http://forum.ntfs-3g.org/viewtopic.php?f=2&t=943), which looks like the problem was resolved by building the kernel with "EFI GUID Partition Support". Does anyone know if unRAID has this feature in the kernel, or how I can check? It looks like several Mac users with external drives formatted as HFS+ run into the same problem. Is this something Tom could add to 4.5? I would first start with a fdisk -l /dev/sdg to see what partitioning the drobo is presenting externally. Perhaps the first partition (/dev/sdg1) is NOT the NTFS partition you expect. You can check to see the kernel features by looking in /usr/src/linux/.config As you suspected, in the .config file: # CONFIG_EFI is not set Joe L.
April 23, 200917 yr Author I would first start with a fdisk -l /dev/sdg to see what partitioning the drobo is presenting externally. Perhaps the first partition (/dev/sdg1) is NOT the NTFS partition you expect. You can check to see the kernel features by looking in /usr/src/linux/.config As you suspected, in the .config file: # CONFIG_EFI is not set Joe L. Thank you Joe, I will test the fdisk tonight when I get home and report back. I tried sdg, sdg1, and sdg2 (did not exist) and none of them worked. I am 100% positive the Drobo is /dev/sdg as I pulled up unmenu and could see sdg with a 17.5 TB parition.
April 23, 200917 yr I set up unRAID a few weeks back and now that it has proven itself, I would like to start using my old primary storage system (Drobo) to back up the unRAID box. My theory when starting out was that I could plug Drobo in via USB and mount it as I would any other external NTFS formatted drive. Of course I tested this with a standard drive and it worked great; however I get errors when trying to do the same thing with the Drobo. Below are the commands I have issued and what the responses are: root@Tower:/mnt# mount -r -t ntfs-3g -o umask=111,dmask=000 /dev/sdg1 /mnt/drobo/ NTFS signature is missing. Failed to mount '/dev/sdg1': Invalid argument The device '/dev/sdg1' doesn't seem to have a valid NTFS. Maybe the wrong device is used? Or the whole disk instead of a partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around? root@Tower:/mnt# mount -r -t ntfs-3g -o umask=111,dmask=000 /dev/sdg /mnt/drobo/ NTFS signature is missing. Failed to mount '/dev/sdg': Invalid argument The device '/dev/sdg' doesn't seem to have a valid NTFS. Maybe the wrong device is used? Or the whole disk instead of a partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around? root@Tower:/mnt# After looking around the web for a bit, I ran into this forum post on the ntfs-3g site (http://forum.ntfs-3g.org/viewtopic.php?f=2&t=943), which looks like the problem was resolved by building the kernel with "EFI GUID Partition Support". Does anyone know if unRAID has this feature in the kernel, or how I can check? It looks like several Mac users with external drives formatted as HFS+ run into the same problem. Is this something Tom could add to 4.5? I enabled "EFI GUID Partition support" in the 4.5-beta5 kernel. Hope to post this today.
April 23, 200917 yr Author I set up unRAID a few weeks back and now that it has proven itself, I would like to start using my old primary storage system (Drobo) to back up the unRAID box. My theory when starting out was that I could plug Drobo in via USB and mount it as I would any other external NTFS formatted drive. Of course I tested this with a standard drive and it worked great; however I get errors when trying to do the same thing with the Drobo. Below are the commands I have issued and what the responses are: root@Tower:/mnt# mount -r -t ntfs-3g -o umask=111,dmask=000 /dev/sdg1 /mnt/drobo/ NTFS signature is missing. Failed to mount '/dev/sdg1': Invalid argument The device '/dev/sdg1' doesn't seem to have a valid NTFS. Maybe the wrong device is used? Or the whole disk instead of a partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around? root@Tower:/mnt# mount -r -t ntfs-3g -o umask=111,dmask=000 /dev/sdg /mnt/drobo/ NTFS signature is missing. Failed to mount '/dev/sdg': Invalid argument The device '/dev/sdg' doesn't seem to have a valid NTFS. Maybe the wrong device is used? Or the whole disk instead of a partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around? root@Tower:/mnt# After looking around the web for a bit, I ran into this forum post on the ntfs-3g site (http://forum.ntfs-3g.org/viewtopic.php?f=2&t=943), which looks like the problem was resolved by building the kernel with "EFI GUID Partition Support". Does anyone know if unRAID has this feature in the kernel, or how I can check? It looks like several Mac users with external drives formatted as HFS+ run into the same problem. Is this something Tom could add to 4.5? I enabled "EFI GUID Partition support" in the 4.5-beta5 kernel. Hope to post this today. Wow, that is fantastic, thank you!! I am very happy to see you reading and posting in the forums so much lately Tom!
April 28, 200917 yr Author I would first start with a fdisk -l /dev/sdg to see what partitioning the drobo is presenting externally. Perhaps the first partition (/dev/sdg1) is NOT the NTFS partition you expect. You can check to see the kernel features by looking in /usr/src/linux/.config As you suspected, in the .config file: # CONFIG_EFI is not set Joe L. I finally got around to testing Drobo last night and running the command requested. I believe the output below shows the need for EFI GUID Partition Support: root@Tower:/dev# fdisk -l /dev/sdg WARNING: GPT (GUID Partition Table) detected on '/dev/sdg'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdg: 17592.1 GB, 17592186044416 bytes 255 heads, 63 sectors/track, 2138794 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0xafa75600 Device Boot Start End Blocks Id System /dev/sdg1 1 258995 2080374783+ ee EFI GPT root@Tower:/dev# On a side note, I was able to connect Drobo via a Windows Vista session through VMWare on the unRAID box, which seemed to work pretty well. I was able to perform a full backup of my unRAID data and Drobo acted as expected. The only minor issue is that I was not able to put the device in Standby to properly disconnect it. We'll wait and see what 4.5 Beta 5 does.
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