Reviews Leaderboard Database Reference Search StorageReview Discussion Reliability Survey Search About StorageReview.com Contents

Quantum Atlas 10k II


StorageReview.com PayPal Donations



One Last Time: The Quantum Atlas 10k II
  August 24, 2000 Author: Eugene Ra  

WB99/Win2k Low-Level Measurements

 Testbed II  Low-Level Measurements Details... 
Windows 2000 Professional using NTFS
Quantum Atlas 10k II Third Sample - 7.8 |
Quantum Atlas 10k II Second Sample - 7.9 |
Fujitsu MAJ3xxx (18.2 GB Ultra160/m SCSI) - 8.5 |
IBM Ultrastar 36LZX (18.3 GB Ultra160/m SCSI) - 8.5 |
Seagate Cheetah 18XL (18.4 GB Ultra160/m SCSI) - 8.9 |
Seagate Cheetah 36LP (36.7 GB Ultra160/m SCSI) - 9.0 |
Windows 2000 Professional using NTFS
Fujitsu MAJ3xxx (18.2 GB Ultra160/m SCSI) - 42767 |
Quantum Atlas 10k II Second Sample - 41467 |
Quantum Atlas 10k II Third Sample - 38400 |
Seagate Cheetah 36LP (36.7 GB Ultra160/m SCSI) - 36167 |
Seagate Cheetah 18XL (18.4 GB Ultra160/m SCSI) - 35967 |
IBM Ultrastar 36LZX (18.3 GB Ultra160/m SCSI) - 34800 |
Windows 2000 Professional using NTFS
Fujitsu MAJ3xxx (18.2 GB Ultra160/m SCSI) - 28300 |
Quantum Atlas 10k II Third Sample - 25100 |
Quantum Atlas 10k II Second Sample - 25000 |
Seagate Cheetah 18XL (18.4 GB Ultra160/m SCSI) - 25000 |
Seagate Cheetah 36LP (36.7 GB Ultra160/m SCSI) - 24100 |
IBM Ultrastar 36LZX (18.3 GB Ultra160/m SCSI) - 22800 |

Click here to examine the STR graph for this drive

An interesting anomaly arises when examining the sequential transfer rates achieved by the third sample. The two previous samples both managed to break the 40 MB/sec barrier in their outer zone. This unit, strangely enough, does not. The 38.4 MB/sec figure listed above is a bit misleading... a look at the STR graph shows the drive missing 40 MB/sec several tracks inwards by just a hair. We contacted Quantum, wondering perhaps if there had been some physical changes to the drive... perhaps a lower sector-per-track count in the outer zone. Quantum states that all physicals have remained the same, however. An engineer hypothesized that the drive may have negotiated an ultra-wide rather than ultra160 connection with our host adapter. A check of the drive in my personal system, however, confirmed the drive, even operating in LVD mode, failed to break 40 MB/sec. Apparently the drive achieved an excess of 41 MB/sec before being shipped out to us (as all of them should). We weren't able to get to the bottom of the problem; Quantum maintains that this is an aberration and that all shipping 10k II units will maintain their impressive outer-zone STRs. Since the small reduction in STR doesn't affect high-level results, both Quantum and StorageReview.com agree that the high-level figures that follow are representative of a full-STR unit.

This third sample maintained the impressive access time that we witnessed in previous units. It's score of 7.8 milliseconds is right in line with its advertised 4.7 ms seek time.

 WinMarks...


HOME | ARTICLES | LEADERBOARD | PERFORMANCE DATABASE | REFERENCE GUIDE
COMMUNITY | RELIABILITY SURVEY | SUPPORT SR! | ABOUT SR |

Copyright © 1998-2005 StorageReview.com, Inc. All rights reserved.
Write: Webmaster