> From: openssl-users [mailto:openssl-users-bounces at openssl.org] On Behalf > Of Viktor Dukhovni > Sent: Friday, January 02, 2015 15:54 > To: openssl-users at openssl.org > Subject: Re: [openssl-users] READ error during tape restore via OpenSSL on > AIX > > On Fri, Jan 02, 2015 at 12:44:43PM -0500, Salz, Rich wrote: > > > They are I/O errors (openssl errstr is your friend here) and probably related > > to the tape I/O device not being ready, timing out, or something like that. > > Tape devices generally require I/O operations to be in multiples of a tape > block. The output of "openssl enc" is not going to satisfy that property. A > final filter is required that "pads" the encrypted output to a multiple of the > tape block size, and strips the padding on input. One traditional way to do this "reblocking" is with the dd command, using "conv=sync". Since this is AIX, the OP might also look at the tctl command, which also has a mode ("tctl write') that reads from standard input and writes complete blocks to a tape device. I'm sure there are plenty of examples online. -- Michael Wojcik Technology Specialist, Micro Focus This message has been scanned for malware by Websense. www.websense.com
