From mboxrd@z Thu Jan 1 00:00:00 1970 From: "U.Mutlu" Subject: How to set DPOFUA=0 ? Date: Sat, 26 Dec 2015 02:25:56 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from plane.gmane.org ([80.91.229.3]:37648 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750725AbbLZBaH (ORCPT ); Fri, 25 Dec 2015 20:30:07 -0500 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1aCdgK-0001Ub-Ow for linux-scsi@vger.kernel.org; Sat, 26 Dec 2015 02:30:04 +0100 Received: from ip4d14b373.dynamic.kabel-deutschland.de ([77.20.179.115]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 26 Dec 2015 02:30:04 +0100 Received: from for-gmane by ip4d14b373.dynamic.kabel-deutschland.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 26 Dec 2015 02:30:04 +0100 Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org Hi, I have got 2 different submodels of the SSD Samsung 850 Evo 500 GB. The first one has DPOFUA=0, the second one has DPOFUA=1 (see below). That with DPOFUA=0 works fine, but the other with DPOFUA=1 doesn't work after mounting; it reports errors and switches to read-only mount. It seems Linux has a problem with DPOFUA=1, so then IMO best would be to disable that feature of the device. So, how & where can DPOFUA be set to value 0 ? Thx ############################################################################ # uname -a Linux panther 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt20-1+deb8u1 (2015-12-14) x86_64 GNU/Linux ############################################################################ Dec 26 00:45:38 panther vmunix: [ 2337.193164] usb 4-1: new SuperSpeed USB device number 2 using xhci_hcd Dec 26 00:45:38 panther vmunix: [ 2337.212852] usb 4-1: New USB device found, idVendor=357d, idProduct=7788 Dec 26 00:45:38 panther vmunix: [ 2337.212861] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Dec 26 00:45:38 panther vmunix: [ 2337.212866] usb 4-1: Product: USB to ATA/ATAPI Bridge Dec 26 00:45:38 panther vmunix: [ 2337.212870] usb 4-1: Manufacturer: JMicron Dec 26 00:45:38 panther vmunix: [ 2337.212874] usb 4-1: SerialNumber: 321AE8171482926 Dec 26 00:45:38 panther vmunix: [ 2337.245338] usb-storage 4-1:1.0: USB Mass Storage device detected Dec 26 00:45:38 panther vmunix: [ 2337.245591] scsi2 : usb-storage 4-1:1.0 Dec 26 00:45:38 panther vmunix: [ 2337.245770] usbcore: registered new interface driver usb-storage Dec 26 00:45:39 panther vmunix: [ 2338.244729] scsi 2:0:0:0: Direct-Access Samsung SSD 850 EVO 500G 0114 PQ: 0 ANSI: 6 Dec 26 00:45:39 panther vmunix: [ 2338.245308] sd 2:0:0:0: Attached scsi generic sg2 type 0 Dec 26 00:45:39 panther vmunix: [ 2338.247115] sd 2:0:0:0: [sdb] Spinning up disk... Dec 26 00:45:49 panther vmunix: [ 2339.251034] ......... Dec 26 00:45:52 panther vmunix: [ 2348.278894] ....ready Dec 26 00:45:52 panther vmunix: [ 2351.288429] sd 2:0:0:0: [sdb] 976773168 512-byte logical blocks: (500 GB/465 GiB) Dec 26 00:45:52 panther vmunix: [ 2351.288953] sd 2:0:0:0: [sdb] Write Protect is off Dec 26 00:45:52 panther vmunix: [ 2351.288959] sd 2:0:0:0: [sdb] Mode Sense: 47 00 10 08 Dec 26 00:45:52 panther vmunix: [ 2351.289447] sd 2:0:0:0: [sdb] Write cache: enabled, read cache: enabled, supports DPO and FUA Dec 26 00:45:52 panther vmunix: [ 2351.293763] sdb: sdb1 sdb2 sdb3 Dec 26 00:45:52 panther vmunix: [ 2351.295862] sd 2:0:0:0: [sdb] Attached SCSI disk Dec 26 00:47:02 panther vmunix: [ 2421.091552] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts: (null) Dec 26 00:47:09 panther vmunix: [ 2428.394003] sd 2:0:0:0: [sdb] Invalid command failure Dec 26 00:47:09 panther vmunix: [ 2428.394013] sd 2:0:0:0: [sdb] Dec 26 00:47:09 panther vmunix: [ 2428.394017] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Dec 26 00:47:09 panther vmunix: [ 2428.394021] sd 2:0:0:0: [sdb] Dec 26 00:47:09 panther vmunix: [ 2428.394024] Sense Key : Illegal Request [current] Dec 26 00:47:09 panther vmunix: [ 2428.394030] sd 2:0:0:0: [sdb] Dec 26 00:47:09 panther vmunix: [ 2428.394034] Add. Sense: Invalid field in cdb Dec 26 00:47:09 panther vmunix: [ 2428.394038] sd 2:0:0:0: [sdb] CDB: Dec 26 00:47:09 panther vmunix: [ 2428.394040] Write(10): 2a 08 02 04 08 20 00 00 08 00 Dec 26 00:47:09 panther vmunix: [ 2428.394054] end_request: critical target error, dev sdb, sector 33818656 Dec 26 00:47:09 panther vmunix: [ 2428.394059] end_request: critical target error, dev sdb, sector 33818656 Dec 26 00:47:09 panther vmunix: [ 2428.394120] Aborting journal on device sdb1-8. Dec 26 00:47:09 panther vmunix: [ 2428.471535] EXT4-fs error (device sdb1): ext4_journal_check_start:56: Detected aborted journal Dec 26 00:47:09 panther vmunix: [ 2428.471547] EXT4-fs (sdb1): Remounting filesystem read-only ############################################################################ # sdparm -a --long /dev/sda /dev/sda: ATA Samsung SSD 850 1B6Q Direct access device specific parameters: WP=0 DPOFUA=0 Read write error recovery [rw] mode page: AWRE 1 [cha: n, def: 1] Automatic write reallocation enabled ARRE 0 [cha: n, def: 0] Automatic read reallocation enabled TB 0 [cha: n, def: 0] Transfer block RC 0 [cha: n, def: 0] Read continuous EER 0 [cha: n, def: 0] Enable early recovery PER 0 [cha: n, def: 0] Post error DTE 0 [cha: n, def: 0] Data terminate on error DCR 0 [cha: n, def: 0] Disable correction RRC 0 [cha: n, def: 0] Read retry count COR_S 0 [cha: n, def: 0] Correction span (obsolete) HOC 0 [cha: n, def: 0] Head offset count (obsolete) DSOC 0 [cha: n, def: 0] Data strobe offset count (obsolete) LBPERE 0 [cha: n, def: 0] Logical block provisioning error reporting enabled WRC 0 [cha: n, def: 0] Write retry count RTL 0 [cha: n, def: 0] Recovery time limit (ms) Caching (SBC) [ca] mode page: IC 0 [cha: n, def: 0] Initiator control ABPF 0 [cha: n, def: 0] Abort pre-fetch CAP 0 [cha: n, def: 0] Caching analysis permitted DISC 0 [cha: n, def: 0] Discontinuity SIZE 0 [cha: n, def: 0] Size enable WCE 1 [cha: y, def: 1] Write cache enable MF 0 [cha: n, def: 0] Multiplication factor RCD 0 [cha: n, def: 0] Read cache disable DRRP 0 [cha: n, def: 0] Demand read retention priority WRP 0 [cha: n, def: 0] Write retention priority DPTL 0 [cha: n, def: 0] Disable pre-fetch transfer length MIPF 0 [cha: n, def: 0] Minimum pre-fetch MAPF 0 [cha: n, def: 0] Maximum pre-fetch MAPFC 0 [cha: n, def: 0] Maximum pre-fetch ceiling FSW 0 [cha: n, def: 0] Force sequential write LBCSS 0 [cha: n, def: 0] Logical block cache segment size DRA 0 [cha: n, def: 0] Disable read ahead SYNC_PROG 0 [cha: n, def: 0] Synchronous cache progress indication NV_DIS 0 [cha: n, def: 0] Non-volatile cache disable NCS 0 [cha: n, def: 0] Number of cache segments CSS 0 [cha: n, def: 0] Cache segment size Control [co] mode page: TST 0 [cha: n, def: 0] Task set type TMF_ONLY 0 [cha: n, def: 0] Task management functions only DPICZ 0 [cha: n, def: 0] Disable protection information check if protect field zero D_SENSE 0 [cha: n, def: 0] Descriptor format sense data GLTSD 1 [cha: n, def: 1] Global logging target save disable RLEC 0 [cha: n, def: 0] Report log exception condition QAM 0 [cha: n, def: 0] Queue algorithm modifier NUAR 0 [cha: n, def: 0] No unit attention on release QERR 0 [cha: n, def: 0] Queue error management RAC 0 [cha: n, def: 0] Report a check UA_INTLCK 0 [cha: n, def: 0] Unit attention interlocks control SWP 0 [cha: n, def: 0] Software write protect ATO 0 [cha: n, def: 0] Application tag owner TAS 0 [cha: n, def: 0] Task aborted status ATMPE 0 [cha: n, def: 0] Application tag mode page enabled RWWP 0 [cha: n, def: 0] Reject write without protection AUTOLOAD 0 [cha: n, def: 0] Autoload mode BTP -1 [cha: n, def: -1] Busy timeout period (100us) ESTCT 30 [cha: n, def: 30] Extended self test completion time (sec) ############################################################################ # sdparm -a --long /dev/sdb /dev/sdb: Samsung SSD 850 EVO 500G 0114 Direct access device specific parameters: WP=0 DPOFUA=1 Caching (SBC) [ca] mode page: IC 0 [cha: n, def: 0, sav: 0] Initiator control ABPF 0 [cha: n, def: 0, sav: 0] Abort pre-fetch CAP 0 [cha: n, def: 0, sav: 0] Caching analysis permitted DISC 1 [cha: n, def: 1, sav: 1] Discontinuity SIZE 0 [cha: n, def: 0, sav: 0] Size enable WCE 1 [cha: n, def: 1, sav: 1] Write cache enable MF 0 [cha: n, def: 0, sav: 0] Multiplication factor RCD 0 [cha: n, def: 0, sav: 0] Read cache disable DRRP 0 [cha: n, def: 0, sav: 0] Demand read retention priority WRP 0 [cha: n, def: 0, sav: 0] Write retention priority DPTL -1 [cha: n, def: -1, sav: -1] Disable pre-fetch transfer length MIPF 0 [cha: n, def: 0, sav: 0] Minimum pre-fetch MAPF -1 [cha: n, def: -1, sav: -1] Maximum pre-fetch MAPFC -1 [cha: n, def: -1, sav: -1] Maximum pre-fetch ceiling FSW 0 [cha: n, def: 0, sav: 0] Force sequential write LBCSS 0 [cha: n, def: 0, sav: 0] Logical block cache segment size DRA 0 [cha: n, def: 0, sav: 0] Disable read ahead SYNC_PROG 0 [cha: n, def: 0, sav: 0] Synchronous cache progress indication NV_DIS 0 [cha: n, def: 0, sav: 0] Non-volatile cache disable NCS 255 [cha: n, def:255, sav:255] Number of cache segments CSS 0 [cha: n, def: 0, sav: 0] Cache segment size Power condition [po] mode page: PM_BG 0 [cha: n, def: 0, sav: 0] Power management, background functions, precedence STANDBY_Y 0 [cha: n, def: 0, sav: 0] Standby_y timer enable IDLE_C 0 [cha: n, def: 0, sav: 0] Idle_c timer enable IDLE_B 0 [cha: n, def: 0, sav: 0] Idle_b timer enable IDLE 0 [cha: n, def: 0, sav: 0] Idle_a timer enable STANDBY 0 [cha: y, def: 1, sav: 0] Standby_z timer enable ICT 0 [cha: n, def: 0, sav: 0] Idle_a condition timer (100 ms) SCT 0 [cha: y, def:18000, sav: 0] Standby_z condition timer (100 ms) IBCT 0 [cha: n, def: 0, sav: 0] Idle_b condition timer (100 ms) ICCT 0 [cha: n, def: 0, sav: 0] Idle_c condition timer (100 ms) SYCT 0 [cha: n, def: 0, sav: 0] Standby_y condition timer (100 ms) CCF_IDLE 0 [cha: n, def: 0, sav: 0] check condition on transition from idle CCF_STAND 0 [cha: n, def: 0, sav: 0] check condition on transition from standby CCF_STOPP 0 [cha: n, def: 0, sav: 0] check condition on transition from stopped ############################################################################