Date: Mon, 22 Sep 2014 09:33:39 +0200 From: Borja Marcos <borjam@sarenet.es> To: Gary Palmer <gpalmer@freebsd.org> Cc: Steven Hartland <killing@multiplay.co.uk>, Stable Stable <freebsd-stable@freebsd.org>, Karl Denninger <karl@denninger.net> Subject: Re: getting to 4K disk blocks in ZFS Message-ID: <1640F942-D90E-46A0-BC18-ED0B73561E6F@sarenet.es> In-Reply-To: <20140920000636.GD51285@in-addr.com> References: <540FF3C4.6010305@ish.com.au> <A0A549F7A4094F519A3660697AB4983F@multiplay.co.uk> <54114029.3060507@FreeBSD.org> <2128347.Ah5i0RTCvp@overcee.wemm.org> <541230F1.3060402@digiware.nl> <7D0869A9-C114-4C4F-877A-3FB26AD7737D@scsiguy.com> <607F83CE25104CE09C74935BA9E26485@multiplay.co.uk> <541CBD5B.8050603@denninger.net> <BA7CD0B47D5F47159BF73FB196563166@multiplay.co.uk> <20140920000636.GD51285@in-addr.com>
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On Sep 20, 2014, at 2:06 AM, Gary Palmer wrote: > If I tell smartctl to ignore it's database it still says it's a 4k In my case, Samsung 840 EVO SSDs connected to a SAS backplane, pass6: <Samsung SSD 840 EVO 1TB EXT0BB0Q> ATA-9 SATA 3.x device pass6: 600.000MB/s transfers, Command Queueing Enabled protocol ATA/ATAPI-9 SATA 3.x device model Samsung SSD 840 EVO 1TB firmware revision EXT0BB0Q serial number S1D9NEADA08556K WWN 50025388500ae92b cylinders 16383 heads 16 sectors/track 63 sector size logical 512, physical 512, offset 0 LBA supported 268435455 sectors LBA48 supported 1953525168 sectors PIO supported PIO4 DMA supported WDMA2 UDMA6 media RPM non-rotating even though it has a 4K quirk da6 at mpr0 bus 0 scbus0 target 30 lun 0 da6: <ATA Samsung SSD 840 BB0Q> Fixed Direct Access SCSI-6 device da6: Serial Number S1D9NEADA08556K da6: 600.000MB/s transfers da6: Command Queueing enabled da6: 953869MB (1953525168 512 byte sectors: 255H 63S/T 121601C) da6: quirks=0x8<4K> smartctl reports the same, 512 logical/physical 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 === Model Family: Samsung based SSDs Device Model: Samsung SSD 840 EVO 1TB Serial Number: S1D9NEADA08556K LU WWN Device Id: 5 002538 8500ae92b Firmware Version: EXT0BB0Q User Capacity: 1,000,204,886,016 bytes [1.00 TB] 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: Mon Sep 22 09:34:24 2014 CEST SMART support is: Available - device has SMART capability. SMART support is: Enabled AAM feature is: Unavailable APM feature is: Unavailable Rd look-ahead is: Enabled Write cache is: Enabled ATA Security is: Disabled, NOT FROZEN [SEC1]
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