disable sleep external USB hard disk

[robinbobin]

иногда внешний USB отваливается /dev/sdb

в /etc/rc.local добавил

hdparm -B 255 /dev/sdb
/dev/sdb:
setting Advanced Power Management level to disabled
SG_IO: missing sense data, results may be incorrect
APM_level      = off

hdparm -S 0 /dev/sdb
/dev/sdb:
setting standby to 0 (off)

и в crontab на раз в час.

посмотрим шо будет


hdparm -I /dev/sdb

ATA device, with non-removable media
        Model Number:      TOSHIBA MQ01ABD100                     
        Serial Number:      85LHC8DOT
        Firmware Revision:  AX1P1A 
        Transport:          Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6
Standards:
        Supported: 8 7 6 5
        Likely used: 8
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: 1953525168
        Logical  Sector size:                  512 bytes
        Physical Sector size:                  4096 bytes
        Logical Sector-0 offset:                  0 bytes
        device size with M = 1024*1024:      953869 MBytes
        device size with M = 1000*1000:    1000204 MBytes (1000 GB)
        cache/buffer size  = 8192 KBytes
        Form Factor: 2.5 inch
        Nominal Media Rotation Rate: 5400
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 = 16  Current = 16
        Advanced power management level: disabled
        DMA: sdma0 sdma1 sdma2 mdma0 mdma1 *mdma2 udma0 udma1 udma2 udma3 udma4 udma5
            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
                Advanced Power Management feature set
                Power-Up In Standby feature set
          *    SET_FEATURES required to spinup after power up
                SET_MAX security extension
          *    48-bit Address feature set
          *    Device Configuration Overlay 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
          *    IDLE_IMMEDIATE with UNLOAD
          *    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)
          *    Native Command Queueing (NCQ)
          *    Host-initiated interface power management
          *    Phy event counters
          *    Idle-Unload when NCQ is active
                DMA Setup Auto-Activate optimization
                Device-initiated interface power management
          *    Software settings preservation
          *    SMART Command Transport (SCT) feature set
          *    SCT LBA Segment Access (AC2)
          *    SCT Error Recovery Control (AC3)
          *    SCT Features Control (AC4)
          *    SCT Data Tables (AC5)
Security:
        Master password revision code = 65534
                supported
        not    enabled
        not    locked
        not    frozen
        not    expired: security count
                supported: enhanced erase
        226min for SECURITY ERASE UNIT. 226min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 5000039673b02d42
        NAA            : 5
        IEEE OUI        : 000039
        Unique ID      : 673b02d42
Checksum: correct