{"id":305,"date":"2005-03-04T13:38:03","date_gmt":"2005-03-04T18:38:03","guid":{"rendered":"http:\/\/linode.siwko.org\/wordpress\/?p=305"},"modified":"2005-03-04T13:38:03","modified_gmt":"2005-03-04T18:38:03","slug":"copying-an-ntfs-disk-over-the-network-using-tomsrtbt","status":"publish","type":"post","link":"https:\/\/www.siwko.org\/wordpress\/?p=305","title":{"rendered":"Copying an NTFS disk over the network using tomsrtbt"},"content":{"rendered":"

I’ve got an old SCSI NTFS disk that I’ve got to get the information out
\nof.  I had it installed on my linux box where I could mount the
\ndisk directly, but I pulled it out and closed up the system and forgot
\nto copy the image over to the big disk there.<\/p>\n

I had done this in the past and used the linux ntfs driver<\/a>
\nto mount the disk and copy the files.  The big disk went bad, I
\ngot it replaced and forgot to copy the NTFS.  Anway, I was looking
\nfor a way to copy the disk without opening up the Linux box again.<\/p>\n

I put the SCSI card and drive into an old P5-100 and booted from a tomsrtbt<\/a>
\nfloppy.  The SCSI drive and network came up, I added an entry to
\nthe \/etc\/fstab for an nfs mount and mounted it.  So far, so good.<\/p>\n

I tried this dd if=\/dev\/sda of=\/public\/old-drive.ntfs and it looked
\ngood up to 2G when I got “File Size Exceeded.”  I poked about and
\nfound dd-lfs (dd for large file systems) which claims to have no 32 bit
\nfile size limit.  It didn’t work either.  There’s something
\nin there that doesn’t like going over 2G.  Anyway, I decided to
\ntry to split the file with dd into chunks.  Here’s the script I
\nran:<\/p>\n

for i in 0 1 2 3 4 5 6 7 8 9<\/span>

\ndo<\/span>

\n  dd-lfs if=\/dev\/sda of=\/public\/old-drive.ntfs.$i bs=1000 count=1000000 skip=${i}000000<\/span>

\ndone<\/span><\/p>\n

It worked, I got this:<\/p>\n

-rw-r–r–  1 root root 1000000000 Mar  3 23:54 old-drive.ntfs.0<\/span>

\n-rw-r–r–  1 root root 1000000000 Mar  4 00:04 old-drive.ntfs.1<\/span>

\n-rw-r–r–  1 root root 1000000000 Mar  4 00:14 old-drive.ntfs.2<\/span>

\n-rw-r–r–  1 root root 1000000000 Mar  4 00:25 old-drive.ntfs.3<\/span>

\n-rw-r–r–  1 root root 1000000000 Mar  4 00:34 old-drive.ntfs.4<\/span>

\n-rw-r–r–  1 root root 1000000000 Mar  4 00:45 old-drive.ntfs.5<\/span>

\n-rw-r–r–  1 root root 1000000000 Mar  4 00:55 old-drive.ntfs.6<\/span>

\n-rw-r–r–  1 root root 1000000000 Mar  4 01:05 old-drive.ntfs.7<\/span>

\n-rw-r–r–  1 root root 1000000000 Mar  4 01:16 old-drive.ntfs.8<\/span>

\n-rw-r–r–  1 root root  100032000 Mar  4 01:17 old-drive.ntfs.9<\/span><\/p>\n

\nHere’s the script to put it back together:<\/p>\n

for i in 0 1 2 3 4 5 6 7 8 9<\/span>

\ndo<\/span>

\n  dd if=\/public\/old-drive.ntfs.$i of=\/public\/old-drive.ntfs bs=1000 count=1000000 seek=${i}000000<\/span>

\ndone<\/span><\/p>\n

\nThre result:<\/p>\n

-rw-r–r–  1 root root 9100032000 Mar  4 10:32 old-drive.ntfs<\/span><\/p>\n

Which looked good to me.  Now just mount it and we’re good to go.<\/p>\n

WRONG!<\/p>\n


\nmount old-drive.ntfs \/public\/old-drive -t ntfs -r -o umask=0222<\/span>

\nmount: old-drive.ntfs is not a block device (maybe try `-o loop’?)<\/span>

\n
\nok, it’s not a block device so we’ll loop the file:<\/p>\n


\nmount old-drive.ntfs \/public\/old-drive -t ntfs -r -o umask=0222 -o loop<\/span>

\nmount: wrong fs type, bad option, bad superblock on \/dev\/loop0,<\/span>

\n       or too many mounted file systems<\/span>

\n       (could this be the IDE device where you in fact use<\/span>

\n       ide-scsi so that sr0 or sda or so is needed?)<\/span>

\n

\nand this shows up in the \/var\/log\/messages<\/p>\n


\nNTFS-fs error (device loop0): ntfs_fill_super(): Not an NTFS volume.<\/span>
<\/p>\n

NTFS-fs error (device loop0): read_ntfs_boot_sector(): Primary boot sector is invalid.<\/span>
<\/p>\n

NTFS-fs error (device loop0): read_ntfs_boot_sector(): Mount option errors=recover not used. Aborting without trying to recover.<\/span>

\n
\nOK, let’s do the loop separately and check it out:<\/p>\n


\nlosetup \/dev\/loop0 \/public\/old-drive.ntfs<\/span>

\nlet’s look at the loop content<\/span>

\nhead \/dev\/loop0  | od -c<\/span>

\n
\nlooks good I see NTFS stuff and PARTITION INFORMATION!!!!<\/p>\n

let’s try this:
 fdisk -l \/dev\/loop0<\/span>

\n <\/span>

\nDisk \/dev\/loop0: 9100 MB, 9100032000 bytes<\/span>

\n255 heads, 63 sectors\/track, 1106 cylinders<\/span>

\nUnits = cylinders of 16065 * 512 = 8225280 bytes<\/span>

\n <\/span>

\n      Device
\nBoot     
\nStart        
\nEnd      Blocks   Id  System<\/span>

\n\/dev\/loop0p1<\/span>  
\n*          
\n1       
\n1106     8883913+   7  HPFS\/NTFS<\/span>

\n

\n
\nvery interesting, we’ve got the whole drive image including the
\npartition table.  More interesting is the \/dev\/loop0p1 device!<\/p>\n


\nmount \/dev\/loop0p1 \/public\/old-drive -t ntfs -r<\/span>

\nmount: special device \/dev\/loop0p1 does not exist<\/span>

\nThis post (http:\/\/lists.samba.org\/archive\/linux\/2004-December\/012635.html<\/a>) gives some insight.  It’s just printed out as a convenince, there’s  no such device (except at NASA apparently).<\/p>\n

The post goes on to say that I can use the offset parameter to go farther into the loop file for the beginning of the device.<\/p>\n

losetup -o 32256<\/span> \/dev\/loop0 \/public\/old-drive.ntfs<\/span>

\nmount \/dev\/loop0 \/public\/old-drive -t ntfs -r<\/span><\/p>\n

Apparently I could have done this in one command:<\/p>\n

mount \/public\/old-drive.ntfs \/public\/old-drive -t ntfs -r -o loop,offset=32256<\/span>

<\/p>\n","protected":false},"excerpt":{"rendered":"

I’ve got an old SCSI NTFS disk that I’ve got to get the information out of.  I had it installed on my linux box where I could mount the disk directly, but I pulled it out and closed up the system and forgot to copy the image over to the big disk there. I had […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-305","post","type-post","status-publish","format-standard","hentry","category-roller"],"_links":{"self":[{"href":"https:\/\/www.siwko.org\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/305"}],"collection":[{"href":"https:\/\/www.siwko.org\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.siwko.org\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.siwko.org\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.siwko.org\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=305"}],"version-history":[{"count":0,"href":"https:\/\/www.siwko.org\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/305\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.siwko.org\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=305"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.siwko.org\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=305"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.siwko.org\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=305"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}