On 2015-12-26 02:25, U.Mutlu wrote: > 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 I think the issue is related to one I have reported earlier in another maillist [1]. The issue was with JMicron USB-to-SATA bridge that incorrectly reported that it supports FUA, while in fact it does not. [1] http://thread.gmane.org/gmane.linux.usb.general/133281 You need to find or add a section to drivers/usb/storage/unusual_devs.h which e.g. reads as follows (replace 0x???? with bcdDevice value from lsusb output): UNUSUAL_DEV( 0x357d, 0x7788, 0x????, 0x????, "JMicron", "USB to ATA/ATAPI Bridge", USB_SC_DEVICE, USB_PR_DEVICE, NULL, US_FL_BROKEN_FUA ), Recompile the kernel, reboot & enjoy :) > ############################################################################ > # 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 > > ############################################################################ -- With best regards, Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
