RE: [Veritas-bu] Backups to disk, your opinion

[Kennedy, Jeffrey]

Title: Message

If you’re dealing with a lot of small files it can increase backup performance.  Many small files do not usually stream fast to tape due to metadata cataloguing, which can cause the drives to stop and start a lot.  Disk has no such issue.   This is not to say it *will* improve performance, just that it might.   I’m not familiar with CDL so have no opinion on it.   ~JK   From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Greenberg, Katherine A Sent: Thursday, November 10, 2005 1:51 PM To: Hindle, Greg Cc: Veritas-bu@mailman.eng.auburn.edu Subject: RE: [Veritas-bu] Backups to disk, your opinion   Personally, anything that comes from EMC is something of which I'm wary... (not a fan! ;) )   Disk backups won't necessarily improve performance. You have to take into consideration the fact that disk drivers are written for random I/O and that tape drivers are meant for streaming I/O, ergo, tape is better for backup. However, it also depends on what you're comparing w/ disk, from a tape perspective. If you have some old DLT 7000 drives that you're comparing, disk will totally win, just by virtue of the fact that the tape drives suck, however, if you're using an LTO III, tape will probably beat out disk from a performance perspective.   just my .02.   ~Kate     -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hindle, Greg Sent: Thursday, November 10, 2005 3:36 PM To: veritas-bu@mailman.eng.auburn.edu Subject: [Veritas-bu] Backups to disk, your opinion Nbu 5.0 mp3 Solaris We are looking into backing up to disk instead of tape. We have looked at the EMC CDL solution. I am curious to know what other solutions people are using and their opinions on what they use. Greg   >>> This e-mail and any attachments are confidential, may contain legal, professional or other privileged information, and are intended solely for the addressee.  If you are not the intended recipient, do not use the information in this e-mail in any way, delete this e-mail and notify the sender. CEG-IP2 This e-mail may contain confidential or privileged information. If you think you have received this e-mail in error, please advise the sender by reply e-mail and then delete this e-mail immediately. Thank you. Aetna