RE: Backup to disk, then tape

I haven't done this before, but assume that I can do this by running a normal online backup (ontape -s -L 0) to (raw) disk, and then using the dd command to copy the raw disk onto tape, seeing that I won't be able to use ontape again ..... I then want to restore the tape back onto raw disk (dd), and then use ontape to restore this to another system (same setup - a copy of the system that was backed up). -----Original Message----- From: Simmons, Keith [mailto:keith.simmons@office2office.biz] Sent: 13 May 2005 12:24 PM To: Dirk Moolman; informix-list@iiug.org Subject: RE: Backup to disk, then tape **** PLEASE DON'T POST HTML **** The 2 Gb limit is an IDS limit (in IDS7 and IDS9 below 9.4). You will only be able to set tape size to 2097152 (2Gb) and will get prompted for a new tape every time this size is reached. By setting the TAPEDEV to a soft link you can change the link to point to a different file for each subsequent 'tape'. I assume the disk system you are archiving to is on a totally separate controller to where the database is. Have you thought about restores? You will need to go through a similar mechanism of swapping softlinks from file to file in order to restore. Where are you backing up your log files? How will you roll them forward in the event of a restore? Why do you feel back-up to disk is any 'better' than tape? Keith -----Original Message----- From: ORourke, Scott [mailto:ScottORourke@liberata.com] Sent: Friday, May 13, 2005 11:08 AM To: 'Dirk Moolman'; informix-list@iiug.org Subject: RE: Backup to disk, then tape PLEASE READ THE IMPORTANT NOTICE BELOW. DO NOT OPEN ANY ATTACHMENT WITHOUT PRIOR VIRUS CHECKING. __________________________________________________________________ Make sure you don't hit the filesystem and/or IDS file size limit! I hit this on 7.31 on SCO Openserver 5.05, where, if I remember correctly, think it was 2gig. Can't remember if this was a SCO or IDS limit though. You can however get round this by setting TAPESIZE appropriately, along with some clever scripting. -----Original Message----- From: Dirk Moolman [mailto:DirkM@mxgroup.co.za] Sent: 13/May/2005 10:38 To: informix-list@iiug.org Subject: Backup to disk, then tape I have to do some backup testing this weekend, testing a new way of backing up our systems. I want to backup to disk, and then back the disk up to tape - which I haven't done before. Any tips / tricks you can share with me ? IDS 7.31 FD3 Solaris 9 Dirk Moolman Database and Unix Administrator HEALTHCORP "People demand freedom of speech as a compensation for the freedom of thought which they seldom use." sending to informix-list __________________________________________________________________ Liberata is the trading name of Liberata UK Limited (Registered in England and Wales - No 1238274) and other Liberata group companies which include Liberata Financial Services Limited (Registered in England and Wales - No 5301492), an entity authorised and regulated by the Financial Services Authority. The holding company is Liberata plc ( Registered in England and Wales - No 3987802). Registered Offices, 17 London End, Beaconsfield Old Town, Buckinghamshire, HP9 2HN IMPORTANT NOTICE: This e-mail (including all attachments) is confidential and may be privileged. It is for the exclusive use of the intended recipient(s) only, and must not be re-transmitted in an amended form without our consent. If you have received it in error, please contact us immediately at ITSecurity@liberata.com. Please then delete it and do not disclose its contents to any other person. Security and reliability of e-mails are not guaranteed. We operate anti-virus programmes but you must take full responsibility for virus checking this e-mail (including all attachments). Liberata plc do not accept any liability in respect of any damage caused by any virus which is not detected. All e-mails to and from anyone @liberata.com may be examined for breaches of employee policies and the law. All e-mails to anyone @liberata.com are communications to the company and not private and confidential to any named individual. ************************************************************************ ********** This message is sent in strict confidence for the addressee only. It may contain legally privileged information. The contents are not to be disclosed to anyone other than the addressee. Unauthorised recipients are requested to preserve this confidentiality and to advise the sender immediately of any error in transmission. This footnote also confirms that this email message has been swept for the presence of computer viruses, however we cannot guarantee that this message is free from such problems. ************************************************************************ ********** sending to informix-list