getting to 4K disk blocks in ZFS
Gary Palmer
gpalmer at freebsd.org
Sat Sep 20 00:06:40 UTC 2014
On Sat, Sep 20, 2014 at 12:43:46AM +0100, 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?
I have some WD Red drives:
ada2 at ahcich2 bus 0 scbus2 target 0 lun 0
ada2: <WDC WD30EFRX-68AX9N0 80.00A80> ATA-9 SATA 3.x device
ada2: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada2: Command Queueing enabled
ada2: 2861588MB (5860533168 512 byte sectors: 16H 63S/T 16383C)
ada2: quirks=0x1<4K>
Note the quirk.
If I tell smartctl to ignore it's database it still says it's a 4k
AF drive
$ smartctl -B /dev/null -i /dev/ada2
smartctl 6.3 2014-07-26 r3976 [FreeBSD 9.2-RELEASE-p10 amd64] (local build)
Copyright (C) 2002-14, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Device Model: WDC WD30EFRX-68AX9N0
Serial Number: WD-WMC1T1329542
LU WWN Device Id: 5 0014ee 058cdc1f7
Firmware Version: 80.00A80
User Capacity: 3,000,592,982,016 bytes [3.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Device is: Not in smartctl database [for details use: -P showall]
ATA Version is: ACS-2 (minor revision not indicated)
SATA Version is: SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is: Sat Sep 20 01:01:41 2014 BST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
$ camcontrol identify ada2
pass2: <WDC WD30EFRX-68AX9N0 80.00A80> ATA-9 SATA 3.x device
pass2: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
protocol ATA/ATAPI-9 SATA 3.x
device model WDC WD30EFRX-68AX9N0
firmware revision 80.00A80
serial number WD-WMC1T1329542
WWN 50014ee058cdc1f7
cylinders 16383
heads 16
sectors/track 63
sector size logical 512, physical 4096, offset 0
LBA supported 268435455 sectors
LBA48 supported 5860533168 sectors
PIO supported PIO4
DMA supported WDMA2 UDMA6
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
SMART yes yes
microcode download yes yes
security yes no
power management yes yes
advanced power management no no
automatic acoustic management no no
media status notification no no
power-up in Standby yes no
write-read-verify no no
unload no no
free-fall no no
Data Set Management (DSM/TRIM) no
Host Protected Area (HPA) yes no 5860533168/5860533168
HPA - Security no
I'm not sure if camcontrol is getting it's data from the kernel
(and therefore may be affected by the quirk) or not?
I've got a similar story for some WD Green AF drives on a different box
ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
ada0: <WDC WD30EZRX-00MMMB0 80.00A80> ATA-8 SATA 3.x device
ada0: Serial Number WD-WCAWZ2071970
ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 2861588MB (5860533168 512 byte sectors: 16H 63S/T 16383C)
ada0: quirks=0x1<4K>
$ smartctl -B /dev/null -i /dev/ada0
smartctl 6.3 2014-07-26 r3976 [FreeBSD 9.3-RELEASE-p1 amd64] (local build)
Copyright (C) 2002-14, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Device Model: WDC WD30EZRX-00MMMB0
Serial Number: WD-WCAWZ2071970
LU WWN Device Id: 5 0014ee 2b17b776d
Firmware Version: 80.00A80
User Capacity: 3,000,592,982,016 bytes [3.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Device is: Not in smartctl database [for details use: -P showall]
ATA Version is: ATA8-ACS (minor revision not indicated)
SATA Version is: SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is: Sat Sep 20 01:04:44 2014 BST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
$ camcontrol identify ada0
pass0: <WDC WD30EZRX-00MMMB0 80.00A80> ATA-8 SATA 3.x device
pass0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
protocol ATA/ATAPI-8 SATA 3.x
device model WDC WD30EZRX-00MMMB0
firmware revision 80.00A80
serial number WD-WCAWZ2071970
WWN 50014ee2b17b776d
cylinders 16383
heads 16
sectors/track 63
sector size logical 512, physical 4096, offset 0
LBA supported 268435455 sectors
LBA48 supported 5860533168 sectors
PIO supported PIO4
DMA supported WDMA2 UDMA6
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 no no
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 5860533168/5860533168
HPA - Security no
Regards,
Gary
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