graystrickland Posted May 13, 2003 Report Share Posted May 13, 2003 What kind of speed is considered NORMAL for doing a disk or file backup to an external USB 2.0 harddrive? I am running Retro 6.0 on a Win2000 Adv. Server pc which is backing up its own local drives to its own external USB 2.0 harddrive. The actual drive is an ATA 133 Maxtor inside a USB 2.0 enclosure. -- ATA is rated at 133 MegaBYTES per SECOND througput -- USB 2.0 is rated at 60 MegaBYTES per SECOND throughput -- Retrospect is achieving 1.1 MegaBYTES per SECOND throughput. Why is Retrospect so slow? Why is it not achieving but about 1/60th of the USB 2.0 potential? Link to comment Share on other sites More sharing options...
Mayoff Posted May 13, 2003 Report Share Posted May 13, 2003 Do you have encryption or data compression enabled in Retrospect? How many MB/Min does the operations log actually report? What does the log report for copy and for compare? How many files and MB/GB are being copied? Feel free to copy and paste a section of the log for us to view. Link to comment Share on other sites More sharing options...
graystrickland Posted May 13, 2003 Author Report Share Posted May 13, 2003 >>Do you have encryption or data compression enabled in Retrospect? No. >>How many MB/Min does the operations log actually report? The bottom line speed varies from 65 MB/Min to 75 MB/Min. >> What does the log report for copy and for compare? >> How many files and MB/GB are being copied? >> Feel free to copy and paste a section of the log for us to view. Thanks for forcing me to read my own log. I was focused on the bottom line speed and failed to appreciate some of the other factors, like the fact that one of my sources is an 80 MB/Sec SCSI array, whereas another is a 133 MB/Sec ATA drive. Still, it all seems slower than it should be. + Retrospect version 6.0.206 Automatically launched at 5/12/2003 9:00 PM + Retrospect Driver Update, version 3.8.106 + Normal backup using EasyScript Backup at 5/12/2003 9:00 PM To Backup Set Backup Set Charlie... Can't use Open File Backup option for Maxtor 120gb (C:), error -1017 (insufficient permissions) - 5/12/2003 9:00:35 PM: Copying Maxtor 120gb (C:) NOTE: THE ABOVE IS AN ATA 133 DRIVE ... 5/12/2003 9:48:10 PM: Snapshot stored, 68.2 MB 5/12/2003 9:48:22 PM: Comparing Maxtor 120gb (C:) ... 5/12/2003 9:51:18 PM: 19 execution errors Completed: 165 files, 380.1 MB, with 31% compression Performance: 110.9 MB/minute (96.6 copy, 130.3 compare) Duration: 00:50:42 (00:43:50 idle/loading/preparing) Can't use Open File Backup option for Drive D (D:), error -1017 (insufficient permissions) - 5/12/2003 9:51:18 PM: Copying Drive D (D:) 5/12/2003 9:51:18 PM: No files need to be copied 5/12/2003 9:54:46 PM: Snapshot stored, 5,961 KB 5/12/2003 9:54:47 PM: Comparing Drive D (D:) 5/12/2003 9:54:49 PM: Execution completed successfully Duration: 00:03:31 (00:03:28 idle/loading/preparing) Can't use Open File Backup option for Drive E (E:), error -1017 (insufficient permissions) - 5/12/2003 9:54:49 PM: Copying Drive E (E:) NOTE: ABOVE IS A SCSI ARRAY BEHIND AN ADAPTEC AAA-131U2 80 MB/Sec ARRAY CONTROLLER 5/13/2003 2:37:41 AM: 23 execution errors Completed: 136862 files, 8.2 GB, with 18% compression Performance: 63.8 MB/minute (62.9 copy, 64.6 compare) Duration: 04:42:52 (00:22:06 idle/loading/preparing) 5/13/2003 2:37:54 AM: 45 execution errors Total performance: 64.9 MB/minute with 19% compression Total duration: 05:37:05 (01:09:25 idle/loading/preparing) Link to comment Share on other sites More sharing options...
Mayoff Posted May 13, 2003 Report Share Posted May 13, 2003 Quote: >>Do you have encryption or data compression enabled in Retrospect? No. Hi, Your log clearly shows that you have software data compression turned on inside of Retrospect, "31% compression". This will slow down the backup greatly. Go to the backup "options" in the script or immediate and turn off compression. Link to comment Share on other sites More sharing options...
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