getting to 4K disk blocks in ZFS

[Mike Tancsa]

On 9/12/2014 4:17 AM, Steven Hartland wrote:
>>
>> I reported the same fact for the new set of WD REDs I installed.
>> Seems that ada and da have different quirks tables...
>> So disks on SATA connectors on the motherboard are diagnosed as being
>> 4Kb.
>> The disks on my twa don't get the quirk and are considered 512b
>
> LMK the ident strings and I'll look to update the quirks tables.

How does it work for controllers like mfi ?  The disks come up as mfisyspd#

They are supposedly 4K drives (when attached to ada). If I set 
vfs.zfs.min_auto_ashift=12 will it "fix" the problem ?

=== START OF INFORMATION SECTION ===
Model Family:     Samsung based SSDs
Device Model:     Samsung SSD 840 PRO Series
Serial Number:    S1ANNSAF225154J
LU WWN Device Id: 5 002538 5a01d79fd
Firmware Version: DXM05B0Q
User Capacity:    128,035,676,160 bytes [128 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-2, ATA8-ACS T13/1699-D revision 4c
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Fri Sep 12 09:17:42 2014 EDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
  # mfiutil show drives
mfi0 Physical Drives:
  8 (  119G) JBOD <Samsung SSD 840 5B0Q serial=S1ANNSAF225154J> SATA E1:S1
  9 (  119G) JBOD <Samsung SSD 840 5B0Q serial=S1ANNSAF225153X> SATA E1:S0
10 (  119G) JBOD <Samsung SSD 840 5B0Q serial=S1ANNSAF225159P> SATA E1:S3
11 (  119G) JBOD <Samsung SSD 840 5B0Q serial=S1ANNSAF225160E> SATA E1:S2

	---Mik3

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-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike at sentex.net
Providing Internet services since 1994 www.sentex.net
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