getting to 4K disk blocks in ZFS

[Karl Denninger]

On 9/19/2014 6:43 PM, Steven Hartland wrote:
>
> ----- Original Message ----- From: "Karl Denninger" <karl at denninger.net>
>
>> >> I'm surprised that we have to constantly add quirks.  Are these
>> >> drives really
>> >> failing to report their ata params correctly?  Is there a reason we
>> >> don't
>> >> currently utilize the ata params data (which is already fetched for
>> >> trim/unmap
>> >> detection) to also set lbppbe (logical block per physical block
>> >> exponent) and
>> >> lalba (lowest aligned lba)?  We may find that many of the existing
>> >> quirks are
>> >> unnecessary if we fix the probe code.
>> >
>> > On the contary I've not found a single drive which reports 4k sectors
>> > on its
>> > own, every single one that I've seen report 4k is because we've
>> added a
>> > quirk for it :(
>> >
>> >
>> Where is Smartctl getting it from?
>>
>> smartctl -i /dev/da2
>> smartctl 6.3 2014-07-26 r3976 [FreeBSD 10.1-BETA1 amd64] (local build)
>> Copyright (C) 2002-14, Bruce Allen, Christian Franke,
>> www.smartmontools.org
>>
>> === START OF INFORMATION SECTION ===
>> Device Model:     HGST HDN724040ALE640
>> Serial Number:    PK2334PCG6NA0B
>> LU WWN Device Id: 5 000cca 24cc30684
>> Firmware Version: MJAOA5E0
>> User Capacity:    4,000,787,030,016 bytes [4.00 TB]
>> Sector Sizes:     512 bytes logical, 4096 bytes physical
>> Rotation Rate:    7200 rpm
>> Form Factor:      3.5 inches
>> Device is:        Not in smartctl database [for details use: -P showall]
>> ATA Version is:   ATA8-ACS T13/1699-D revision 4
>> SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
>> Local Time is:    Fri Sep 19 18:33:16 2014 CDT
>> SMART support is: Available - device has SMART capability.
>> SMART support is: Enabled
>>
>> It's not coming from a database, as Smartctl doesn't know about these
>> (yet); they're too new.
>
> Exception to prove the rule?
>
> What to "camcontrol identify da2" report?
>
> Regards
> Steve

Not an exception!  _*All*_ of my 4k block drives report so on smartctl.

It was possible some of those were in the database that way (they say
they are) but these are not, and I have a number of them from different
vendors and series. (Seagates, HGSTs, etc.)

[root at NewFS /disk/karl]# camcontrol identify da2
pass2: <HGST HDN724040ALE640 MJAOA5E0> ATA-8 SATA 3.x device
pass2: 600.000MB/s transfers, Command Queueing Enabled

protocol              ATA/ATAPI-8 SATA 3.x
device model          HGST HDN724040ALE640
firmware revision     MJAOA5E0
serial number         PK2334PCG6NA0B
WWN                   5000cca24cc30684
cylinders             16383
heads                 16
sectors/track         63
sector size           logical 512, physical 4096, offset 0
LBA supported         268435455 sectors
LBA48 supported       7814037168 sectors
PIO supported         PIO4
DMA supported         WDMA2 UDMA6
media RPM             7200

Feature                      Support  Enabled   Value           Vendor
read ahead                     yes      yes
write cache                    yes      yes
flush cache                    yes      yes
overlap                        no
Tagged Command Queuing (TCQ)   no       no
Native Command Queuing (NCQ)   yes              32 tags
NCQ Queue Management           no
NCQ Streaming                  no
Receive & Send FPDMA Queued    no
SMART                          yes      yes
microcode download             yes      yes
security                       yes      no
power management               yes      yes
advanced power management      yes      no      0/0x00
automatic acoustic management  no       no
media status notification      no       no
power-up in Standby            yes      no
write-read-verify              no       no
unload                         no       no
general purpose logging        yes      yes
free-fall                      no       no
Data Set Management (DSM/TRIM) no
Host Protected Area (HPA)      yes      no      7814037168/7814037168
HPA - Security                 no

NEXT!

-- 

Karl Denninger
karl at denninger.net <mailto:karl at denninger.net>
/The Market Ticker/
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