Bug 269807 - mrsas reports incorrect transfers value
Summary: mrsas reports incorrect transfers value
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: bin (show other bugs)
Version: 13.1-RELEASE
Hardware: Any Any
: --- Affects Only Me
Assignee: freebsd-bugs (Nobody)
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-02-24 19:56 UTC by Dan Langille
Modified: 2023-02-24 19:56 UTC (History)
0 users

See Also:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Dan Langille freebsd_committer freebsd_triage 2023-02-24 19:56:11 UTC 
I'm running the mrsas driver with FreeBSD 13.1 on a Dell R730.

AVAGO MegaRAID SAS FreeBSD mrsas driver version: 07.709.04.00-fbsd
mrsas0: <AVAGO Invader SAS Controller> port 0x3000-0x30ff mem 0x92600000-0x9260ffff,0x92500000-0x925fffff irq 26 at device 0.0 numa-domain 0 on pci3

The SSDs connected to this HBA report: 150.000MB/s transfers, for example:

da8 at mrsas0 bus 1 scbus1 target 8 lun 0
da8: <ATA WDC  WDS400T2B0A 20WD> Fixed Direct Access SPC-4 SCSI device
da8: Serial Number 230151801478        
da8: 150.000MB/s transfers
da8: 3815447MB (7814037168 512 byte sectors)

However, a test of that drive shows sppeds of about 460 MB/s, far about that reported level.

Could the mrsas driver be wrong about what it's saying?