Unsolved
This post is more than 5 years old
100 Posts
0
1411
Backup to raw partition in stead of to partition with filesystem
Hi,
I want to measure the performance difference between:
1. backup to disk on a partition with a NTFS filesystem - block size 1024K. I get 60Gb/h. I have defined for this D:\BCK as the path to my adv_file device at creation time of the device. It works fine.
2. backup to disk on a partition without a filesystem - a raw partition. I have created the device referring to F:\. So far so good. But when I try to label the device it get:
cannot open F:\\volhdr file. The volume does not contain a recognized filesystem. Please be sure that all all the filesystem drivers loaded and that the volume is not corrupted.
Do i need to do something special for a RAW partition or is it simply not possible to backup to such a partition ? I thought that LEgato could backup to a raw partition.... ???
Tx,
Johan
coganb
736 Posts
0
September 8th, 2010 00:00
Hi Johan,
Have a look at the NetWorker 7.6 Admin Guide:
http://powerlink.emc.com/km/live1/en_US/Offering_Technical/Technical_Documentation/300-009-443.pdf?
Starting at Page 87, 'Considerations for Backing Up Raw Partitions'. Test this and let us know how you get on.
-Bobby
Johans2
100 Posts
0
September 8th, 2010 03:00
Bobby,
I have read the admin guide. I still do not understand.
Iwant to backup TO a raw partition (without a filesystem). But at creation time of the ADV_FILE device, i have to specify a path with a valid directory where the backups will be stored for F:\BCK. But I cannot create of course the directory BCK on F: because F: has no filesystem.
I don't understand the sentence page 249 of the admin guide saying in point 1: "Create one directory for each disk (or partition) to be used for AFTD... Each disk (or partition) requires a directory that is used for file type device or AFTD storage..." How can i create a directory on the partition if there is not file system ?
I don't find the info i need to create the adv_file for a backup TO a RAW partition.
Rgds,
Johan
Daniea3
123 Posts
0
September 8th, 2010 04:00
I don't think you can create a File type or Adv_File_type device on a raw partition without any filesystem. Correct me if I am wrong.
Regards,
Arun
Johans2
100 Posts
0
September 8th, 2010 04:00
Hi Arun,
Having read the Admin guide , I have the same impression as you. Adv_file device needs a filesystem on the disk to be able to create the device that will hold the backups.
If anyone else has a other info, please let me know ....
Rgds,
Johan
masonb
445 Posts
0
September 8th, 2010 06:00
Johans,
NetWorker can backup raw partitions (as a source of Data), however it cannot use raw partitions as a target. For AFTD we need a file system present to create the directory structure required to store the backups in. I am sorry this was not clear to you reading the documentation. When securing data on a raw partition you must be aware because of the nature of the backup it is an all or nothing restore - i.e. you have to restore the whole partition as we have no info about files/data on this other than the block.
Regards,
Bill Mason
Johans2
100 Posts
0
September 8th, 2010 23:00
Thanks William, it is clear now.
Rgds,
Johans