Salve, ho installato una debian su un pc con processore Sempron3000 hd 40Gb 512Mb ram ddr2. ho riscontrato però una lentezza incredibile, quando un programma tenta di accedere al disco perfino il mouse comincia ad andare a scatti.
questo è l'output di hdparm -I /dev/hda
mentre questo è l'output di hdparm -d /dev/hdacodice:/dev/hda: ATA device, with non-removable media Model Number: SAMSUNG SP40A2H Serial Number: 0469J1FW260177 Firmware Revision: RR100-07 Standards: Used: ATA/ATAPI-6 T13 1410D revision 1 Supported: 6 5 4 Configuration: Logical max current cylinders 16383 16383 heads 16 16 sectors/track 63 63 -- CHS current addressable sectors: 16514064 LBA user addressable sectors: 78242976 device size with M = 1024*1024: 38204 MBytes device size with M = 1000*1000: 40060 MBytes (40 GB) Capabilities: LBA, IORDY(cannot be disabled) Standby timer values: spec'd by Standard, no device specific minimum R/W multiple sector transfer: Max = 16 Current = ? Recommended acoustic management value: 128, current value: 0 DMA: 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 * DOWNLOAD_MICROCODE SET_MAX security extension Automatic Acoustic Management feature set * Mandatory FLUSH_CACHE * SMART error logging * SMART self-test Security: supported not enabled not locked not frozen not expired: security count supported: enhanced erase 48min for SECURITY ERASE UNIT. 48min for ENHANCED SECURITY ERASE UNIT. HW reset results: CBLID- above Vih Device num = 0 determined by the jumper Checksum: correct
provando ad abilitare il dmacodice:/dev/hda: using_dma = 0 (off)
oppure cosìcodice:calimero:/home/matteo# hdparm -d1 -X udma4 /dev/hda /dev/hda: setting using_dma to 1 (on) HDIO_SET_DMA failed: Operation not permitted setting xfermode to 68 (UltraDMA mode4) using_dma = 0 (off)
ottengo lo stesso risultato (non si riesce ad abilitare...)codice:calimero:/home/matteo# hdparm -d1 /dev/hda /dev/hda: setting using_dma to 1 (on) HDIO_SET_DMA failed: Operation not permitted using_dma = 0 (off)


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