[Bug 202712] [cam] [ata] System doesn't recognize older hdd after boot

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202712

--- Comment #32 from Domagoj Hranjec <cab902 at yahoo.com> ---
(In reply to Andriy Gapon from comment #30)

Put hw.ata.ata_dma=0 to /boot/loader.conf.
Disks are now in PIO mode:

ada0 at ata0 bus 0 scbus0 target 0 lun 0
ada0: <ST340014A 8.01> ATA-6 device
ada0: Serial Number 5JXDHA76
ada0: 16.700MB/s transfers (PIO4, PIO 8192bytes)
ada0: 38166MB (78165360 512 byte sectors)
ada1 at ata1 bus 0 scbus1 target 1 lun 0
ada1: <WDC AC2420F 06.16K25> ATA device
ada1: Serial Number WD-WM2680354231
ada1: 11.100MB/s transfers (PIO3, PIO 8192bytes)
ada1: 405MB (830760 512 byte sectors)

However, same errors appear and ada1 stays non functional:

(ada1:ata1:0:1:0): READ_MUL. ACB: c4 00 00 00 00 40 00 00 00 00 01 00
(ada1:ata1:0:1:0): CAM status: ATA Status Error
(ada1:ata1:0:1:0): ATA status: 59 (DRDY SERV DRQ ERR), error: 10 (IDNF )
(ada1:ata1:0:1:0): RES: 59 10 00 00 00 00 00 00 00 01 00
(ada1:ata1:0:1:0): Retrying command
(ada1:ata1:0:1:0): READ_MUL. ACB: c4 00 00 00 00 40 00 00 00 00 01 00
(ada1:ata1:0:1:0): CAM status: ATA Status Error
(ada1:ata1:0:1:0): ATA status: 59 (DRDY SERV DRQ ERR), error: 10 (IDNF )
(ada1:ata1:0:1:0): RES: 59 10 00 00 00 00 00 00 00 01 00
(ada1:ata1:0:1:0): Error 5, Retries exhausted

root at spitfire:/home/hark # fdisk /dev/ada1
fdisk: could not detect sector size

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