Hi all, After reading http://en.wikipedia.org/wiki/Parallel_ATA#Features_introduced_with_each_ATA_revision it seemed clear to me that there was a direct relation between the operating speed of a (P)ATA hard disk drive and the version of the ATA standard it implemented. However I see the following in my kernel logs on an old machine (kernel 2.6.34, Intel ICH5 controller): ata1: PATA max UDMA/100 cmd 0xeff0 ctl 0xefe4 bmdma 0xef90 irq 18 ata2: PATA max UDMA/100 cmd 0xefa8 ctl 0xefe0 bmdma 0xef98 irq 18 ata2.00: HPA unlocked: 40018511 -> 40020624, native 40020624 ata2.00: ATA-6: Maxtor 52049H4, DAC10SC0, max UDMA/100 ata2.00: 40020624 sectors, multi 16: LBA ata1.00: HPA unlocked: 78175679 -> 78177792, native 78177792 ata1.00: ATA-5: MAXTOR 6L040J2, A93.0300, max UDMA/133 ata1.00: 78177792 sectors, multi 16: LBA While the second disk matches the wikipedia table (ATA-6 introduced UDMA/100), the first one doesn't: UDMA/133 wasn't supposed to exist in standard ATA-5. Digging old logs, I also found this (same machine, same kernel, different drive): ata2.00: ATA-4: WDC WD102AA, 05.05B05, max UDMA/66 Here again, UDMA/66 wasn't supposed to exist in standard ATA-4. Can anyone explain this mystery to me? Thanks, -- Jean Delvare -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
