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Topic: Mandatory FLUSH CACHE command? (Read 1925 times) previous topic - next topic
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Mandatory FLUSH CACHE command?

Hi,

here's what hdparm says about my drive:
Code: [Select]
hdparm -I /dev/hdd

/dev/hdd:

ATAPI CD-ROM, with removable media
        Model Number:       LITE-ON DVD SOHD-16P9SV
        Serial Number:
        Firmware Revision:  F$02
Standards:
        Used: ATAPI for CD-ROMs, SFF-8020i, r2.5
        Supported: CD-ROM ATAPI-2
Configuration:
        DRQ response: 50us.
        Packet size: 12 bytes
Capabilities:
        LBA, IORDY(cannot be disabled)
        DMA: mdma0 mdma1 mdma2 udma0 udma1 *udma2
             Cycle time: min=120ns recommended=120ns
        PIO: pio0 pio1 pio2 pio3 pio4
             Cycle time: no flow control=240ns  IORDY flow control=120ns
Commands/features:
        Enabled Supported:
                DEVICE RESET cmd
                PACKET command feature set
                Mandatory FLUSH CACHE command


What does "Mandatory FLUSH CACHE command" actually mean? Can this be used to flush the read cache until the computer is rebooted? Or is it something you would have to do before every read?

Cheers

mic