Re: Avoid tar for Dell PowerVault 100T DAT 72 tape drive?
Tom Oak wrote: The user's guide for the Dell PowerVault 100T DAT 72 tape drive recommends against using tar (see quoted text below). Does anyone have any experience with this product and can advise whether we should avoid tar? Thank you for your help. The concern they have is valid, as tar defaults to using a tiny block size (512 or 2048 bytes, depending), which will cause the tape drive to start and stop rather than stream. Fortunately, you can either pipe tar into dd to change the blocksize, or else change the blocksize to something larger using the -b (--block-size for gnutar) option. For what it's worth, I've been using a blocksize of 126 (* 512, or 63K) with DLT drives for years now. Why 63K is (or was) faster than 32K or 64K or other values is not at all clear to me :-), so do your own testing to see. -- -Chuck ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Avoid tar for Dell PowerVault 100T DAT 72 tape drive?
Hello All, The user's guide for the Dell PowerVault 100T DAT 72 tape drive recommends against using tar (see quoted text below). Does anyone have any experience with this product and can advise whether we should avoid tar? Thank you for your help. Note: please note that my email address has changed from "[EMAIL PROTECTED]" to "[EMAIL PROTECTED]". Tom BEGIN QUOTE Drivers for Microsoft® Windows 2000 and Windows 2003 Server for your tape drive are included on the CD that came with your drive. You will need tape backup software that supports the Dell PowerVault tape drive. Note that native backup applications (for example, the UNIX .tar command) generally do not provide the required data streaming rate to get the full performance out of your tape drive. Dell recommends using a backup application that provides improved memory management as well as other useful features, such as TapeAlert. Suitable products that have been tested with Dell PowerVault 100T DAT 72 tape drives are listed below. Yosemite TapeWare® 7.0SP3B (or later) for Windows 2000, Windows 2003 Server, Novell® NetWare® and Red Hat® Linux® VERITAS® Backup Exec 9.1 (or later) for Windows 2000 and Windows 2003 Server, Backup Exec 9.1 (or later) for Novell® NetWare® END QUOTE -- Tom Oak [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
