# Disk Backup performance data

Here are some numbers on Snapshot disk imaging performance, comparing both speed and compression ratios for certain configurations to other disk imaging software.

Please note however:

- All these data are data and configuration dependent.
- The measurements were performed by ourselves, so you shouldn't rely on there objectivity.
  However no attempt was done to produce fake data.

  ### Snapshot vs.
  PQDI vs.
  GHOST

  The comparisons were done using PQDI 3.0 and Ghost 5.0.
  For both products, newer versions exist.
  Should these perform significantly better, we apologize.

  Configurations tested:
- P200MMX, 64MB memory,ATA66 DOS 6.2, HIMEM+SMARTDRV
- P200MMX, 64MB memory,ATA66 WinNT4.0
- PIII700, 256MB memory,ATA100 DOS 6.2, HIMEM+SMARTDRV
- PIII700, 256MB memory,ATA100 Win2K
- Dual PIII700, 256MB memory, Win2K

  The tested hard drive was always the same: 30 GB IBM, 5400 rpm.
  The copied partition was in all cases the P200 boot drive with WinNT4.0,FAT16, size = 1 GB, 864 MB used.

  | Image size | P200 Time | P700 Time | P700 dual | P700 MB/min
  PQDI, low compression | 499,422,797 | 4:43 | 3:57 |  | 218
  PQDI, high compression | 394.881.808 | 8:10 | 4:50 |  | 178
  Ghost, low compression | 490.463.605 | 9:40 | 6:40 |  | 129
  Ghost, high compression | 391,454,564 | 21:54 | 10:45 |  | 80
  Snapshot default | 412,312,064 | 10:28 | 2:00 | 1:30 | 432
  Snapshot byte mode | 406,496,960 | 10:32 | 2:01 | 1:31 | 428

  ### Snapshot vs.
  Win2000 Backup

  All tests were done on a PIII700 Dual, Win2K SP1, 256MB RAM.
  The network 'server' was a P200MMX, WinNT 4.0 Workstation, 64MB RAM.
  FAT16 NT4 System partition, 1GB, 649 MB used, cluster size 32K

  | Image size | local drive | MB/min | network | MB/min
  Win2K Backup | 588,861,440 | 3:11 | 184 | 3:31 | 167
  Snapshot, default | 324,358,656 | 1:09 | 511 | 2:31 | 233
  Snapshot, byte mode | 284,323,328 | 1:09 | 511 | 2:17 | 257

  NTFS Win2K system partition, 2GB, 1314 MB used, 200 MB PAGEFILE.SYS, cluster size 2K

  | Image size | local drive | MB/min | network | MB/min
  Win2K Backup | 1,101,501,440 | 7:43 | 142 | 8:21 | 131
  Snapshot, default | 667,919,360 | 2:11 | 504 | 5:22 | 205
  Snapshot, byte mode | 663,210,494 | 2:17 | 482 | 5:34 | 197

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