Arch Linux

thunderwolf318

Member

Registered: 2005-05-30

Posts: 54

Very slow system drive access.

So I am having a problem with my system drive where read and write access to it is very very slow. Anytime it is accessed my cpu usages on one or both cores jumps to 100 when all my processes are sitting at less than 5%. the output of sudo hdparm -Tt /dev/sdb is

/dev/sdb:
 Timing cached reads:     2 MB in  3.19 seconds = 641.04 kB/sec
 Timing buffered disk reads:   2 MB in  3.19 seconds = 642.58 kB/sec

and sudo hdparm -I /dev/sdb is

 /dev/sdb:

ATA device, with non-removable media
        Model Number:       WDC WD5000AAKS-00YGA0                   
        Serial Number:      WD-WCAS84341403
        Firmware Revision:  12.01C02
        Transport:          Serial, SATA 1.0a, SATA II Extensions, SATA Rev 2.5
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:  976771055
        Logical/Physical Sector size:           512 bytes
        device size with M = 1024*1024:      476938 MBytes
        device size with M = 1000*1000:      500106 MBytes (500 GB)
        cache/buffer size  = 16384 KBytes
Capabilities:
        LBA, IORDY(can be disabled)
        Queue depth: 32
        Standby timer values: spec'd by Standard, with device specific minimum
        R/W multiple sector transfer: Max = 16  Current = 16
        Recommended acoustic management value: 128, current value: 254
        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
                Power-Up In Standby feature set
           *    SET_FEATURES required to spinup after power up
                SET_MAX security extension
                Automatic Acoustic Management feature set
           *    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
           *    64-bit World wide name
           *    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
                DMA Setup Auto-Activate optimization
           *    Software settings preservation
           *    SMART Command Transport (SCT) feature set
           *    SCT Long Sector Access (AC1)
           *    SCT LBA Segment Access (AC2)
           *    SCT Error Recovery Control (AC3)
           *    SCT Features Control (AC4)
           *    SCT Data Tables (AC5)
                unknown 206[12] (vendor specific)
                unknown 206[13] (vendor specific)
Security: 
        Master password revision code = 65534
                supported
        not     enabled
        not     locked
        not     frozen
        not     expired: security count
                supported: enhanced erase
        134min for SECURITY ERASE UNIT. 134min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 50014ee1ab449b89
        NAA             : 5
        IEEE OUI        : 0014ee
        Unique ID       : 1ab449b89
Checksum: correct

TigTex

Member

From: Portugal

Registered: 2008-06-19

Posts: 301

Re: Very slow system drive access.

wow! that's slow!
Have you tried to check your hdd's SMART information, to see if it isn't damaged?
And what about other linux distros / OS's ? Do they do the same?

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.::. TigTex @ Portugal .::.