Comment 7 for bug 246861

I'm also getting a cryptic E_FAIL from 7za, but I'm not doing any encrypting. Should this be a separate bug?

# dd if=/dev/sda bs=1024k conv=noerror,sync | pv | 7za a ./backup-sda.7z -si -bd

7-Zip (A) 4.58 beta Copyright (c) 1999-2008 Igor Pavlov 2008-05-05
p7zip Version 4.58 (locale=en_GB.UTF-8,Utf16=on,HugeFiles=on,2 CPUs)
Creating archive ./backup-sda.7z

Compressing [Content]/s] [ <=> ]

System error:
E_FAIL
6.83GB 0:57:38 [2.02MB/s] [ <=> ]

For now I'll just use gzip, but it would be nice to compress my raw disk images on-the-fly with 7z.