[nvmewin] 回覆: device formatted time

[許銘洲]

Hi Suman,

        Thank you again for your help, after I set  NVME_MAX_NUM_BLOCKS_PER_READ_WRITE value from 0xFFFF to 0xFFFFFFFF, OFA driver formatted time can quick as well as MS inbox driver.

I notice that OFA driver transfers SCSI unmap command to NVMe dataset management command, and dataset management can deal with 4bytes logical blocks length in range definition.  Why did OFA driver's MaximumUnmapLBACount set 0xFFFF rather than 0xFFFFFFFF?

Thanks,
       Joe


________________________________
從: 許銘洲
寄件日期: 2017年12月8日 上午 09:30
至: suman.p at samsung.com; nvmewin at lists.openfabrics.org
副本: Meenakshikumar Somasundaram; PRAKASH BABU VEMULA
主旨: RE: [nvmewin] device formatted time

Hi Suman,
     Thank you for your reply. I will test it. If I have any progress, I will feedback.

Thanks,
       Joe#3138

From: SUMAN PRAKASH B [mailto:suman.p at samsung.com]
Sent: Thursday, December 07, 2017 5:53 PM
To: 許銘洲; nvmewin at lists.openfabrics.org
Cc: Meenakshikumar Somasundaram; PRAKASH BABU VEMULA
Subject: RE: [nvmewin] device formatted time


Hi Joe,



We have seen this issue earlier. In OFA driver, more time is taken for format because the maximum number of LBAs to unmap is less compared to value set by MS driver.
We have to increase the maximum number of LBAs to unmap in SntiTranslateBlockLimitsPage() in pBLPage->MaximumUnmapLBACount.



Thanks,
Suman



--------- Original Message ---------

Sender : 許銘洲 <joe_mchsu at phison.com<mailto:joe_mchsu at phison.com>>

Date : 2017-12-07 14:09 (GMT+5:30)

Title : [nvmewin] device formatted time


Hi, Everyone,
I have a formatted time issue with OFA driver on windows 10. I use a 256GB Nvme drive to test. Device’s formatted time costs about 40~50 seconds with OFA driver, but it only costs 1 ~ 2 seconds with Microsoft inbox nvme driver.
Is there any chance to improve it?
Thanks,
       Joe#3138



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