----- Original Message -----
> From: "Pascal Hambourg" <pas...@plouf.fr.eu.org>
[...] 
> >>> C'est la partie "max sectors   = 0/1, HPA is enabled" que
> >>> je ne sais pas interpréter.
> >>
> >> La commande hdparm a échoué, donc le résultat n'a aucune valeur.
> > 
> > Pour info, pour l'instant mon SSD est branché en USB 2 sur mon PC,
> > certaines fonctions peuvent ne pas être opérationnelles.
> 
> Ah, ça explique. Les commandes ATA envoyées par hdparm ne doivent pas
> passer à travers le convertisseur USB-SATA. C'est commun.
>

Pour info, la commande pour modifier "Over provisioning", d'après
http://www.tech-g.com/2015/06/13/over-provisioning-ssd-in-linux/ :
hdparm -Np1758172678 --yes-i-know-what-i-am-doing /dev/sdb 


Je viens de redémarrer mon système avec ma Live Debian Stretch, les
informations fournies sont différentes, voir ci-dessous. Tout à la
fin, je me retrouve avec un truc pas normal :

 max sectors   = 500118192/1(500118192?), HPA setting seems 
invalid (buggy kernel device driver?)


/*******************/

root@debian:/dev# smartctl -i /dev/sda
smartctl 6.6 2016-05-31 r4324 [x86_64-linux-4.9.0-4-amd64] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     ADATA SU800
Serial Number:    2H0720020757
LU WWN Device Id: 5 707c18 100451123
Firmware Version: P1021A
User Capacity:    256 060 514 304 bytes [256 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Form Factor:      2.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-3 (minor revision not indicated)
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sat Dec 30 15:41:01 2017 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled



eoot@debian:/dev# hdparm -I /dev/sda

/dev/sda:

ATA device, with non-removable media
        Model Number:       ADATA SU800                             
        Serial Number:      2H0720020757        
        Firmware Revision:  P1021A  
        Transport:          Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, 
SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0
Standards:
        Supported: 10 9 8 7 6 5 
        Likely used: 10
Configuration:
        Logical         max     current
        cylinders       16383   16383
        heads           16      16
        sectors/track   63      63
        --
        CHS current addressable sectors:    16514064
        LBA    user addressable sectors:   268435455
        LBA48  user addressable sectors:   500118192
        Logical  Sector size:                   512 bytes
        Physical Sector size:                   512 bytes
        Logical Sector-0 offset:                  0 bytes
        device size with M = 1024*1024:      244198 MBytes
        device size with M = 1000*1000:      256060 MBytes (256 GB)
        cache/buffer size  = unknown
        Form Factor: 2.5 inch
        Nominal Media Rotation Rate: Solid State Device
Capabilities:
        LBA, IORDY(can be disabled)
        Queue depth: 32
        Standby timer values: spec'd by Standard, no device specific minimum
        R/W multiple sector transfer: Max = 2   Current = 2
        DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 
             Cycle time: min=120ns recommended=120ns
        PIO: pio0 pio1 pio2 pio3 pio4 
             Cycle time: no flow control=120ns  IORDY flow control=120ns
Commands/features:
        Enabled Supported:
           *    SMART feature set
                Security Mode feature set
           *    Power Management feature set
           *    Write cache
           *    Look-ahead
           *    Host Protected Area feature set
           *    WRITE_BUFFER command
           *    READ_BUFFER command
           *    NOP cmd
           *    DOWNLOAD_MICROCODE
                SET_MAX security extension
           *    48-bit Address feature set
           *    Mandatory FLUSH_CACHE
           *    FLUSH_CACHE_EXT
           *    SMART error logging
           *    SMART self-test
           *    General Purpose Logging feature set
           *    WRITE_{DMA|MULTIPLE}_FUA_EXT
           *    64-bit World wide name
           *    WRITE_UNCORRECTABLE_EXT command
           *    {READ,WRITE}_DMA_EXT_GPL commands
           *    Segmented DOWNLOAD_MICROCODE
           *    Gen1 signaling speed (1.5Gb/s)
           *    Gen2 signaling speed (3.0Gb/s)
           *    Gen3 signaling speed (6.0Gb/s)
           *    Native Command Queueing (NCQ)
           *    Host-initiated interface power management
           *    Phy event counters
           *    READ_LOG_DMA_EXT equivalent to READ_LOG_EXT
           *    DMA Setup Auto-Activate optimization
                Device-initiated interface power management
           *    Software settings preservation
                Device Sleep (DEVSLP)
           *    SMART Command Transport (SCT) feature set
           *    SCT Write Same (AC2)
           *    SCT Features Control (AC4)
           *    SCT Data Tables (AC5)
           *    SANITIZE feature set
           *    BLOCK_ERASE_EXT command
           *    DOWNLOAD MICROCODE DMA command
           *    WRITE BUFFER DMA command
           *    READ BUFFER DMA command
           *    Data Set Management TRIM supported (limit 8 blocks)
           *    Deterministic read ZEROs after TRIM
Security: 
        Master password revision code = 65534
                supported
        not     enabled
        not     locked
                frozen
        not     expired: security count
                supported: enhanced erase
        2min for SECURITY ERASE UNIT. 2min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 5707c18100451123
        NAA             : 5
        IEEE OUI        : 707c18
        Unique ID       : 100451123
Device Sleep:
        DEVSLP Exit Timeout (DETO): 220 ms (drive)
        Minimum DEVSLP Assertion Time (MDAT): 31 ms (drive)
Checksum: correct


root@debian:/dev# hdparm -i /dev/sda

/dev/sda:

 Model=ADATA SU800, FwRev=P1021A, SerialNo=2H0720020757
 Config={ Fixed }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=unknown, MaxMultSect=2, MultSect=off
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=500118192
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio3 pio4 
 DMA modes:  mdma0 mdma1 mdma2 
 UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6 
 AdvancedPM=no WriteCache=enabled
 Drive conforms to: Unspecified:  ATA/ATAPI-4,5,6,7

 * signifies the current active mode

root@debian:/dev# 




root@debian:/dev# hdparm -i /dev/sda

/dev/sda:

 Model=ADATA SU800, FwRev=P1021A, SerialNo=2H0720020757
 Config={ Fixed }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=unknown, MaxMultSect=2, MultSect=off
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=500118192
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio3 pio4 
 DMA modes:  mdma0 mdma1 mdma2 
 UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6 
 AdvancedPM=no WriteCache=enabled
 Drive conforms to: Unspecified:  ATA/ATAPI-4,5,6,7

 * signifies the current active mode

root@debian:/dev# hdparm -N /dev/sda

/dev/sda:
 max sectors   = 500118192/1(500118192?), HPA setting seems invalid (buggy 
kernel device driver?)
root@debian:/dev# 




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