I've also discovered that the scsi address is not consistent. Sometimes it will be zero indexed, other times 1 indexed. This changes each reboot (about 15% zero index, 85% 1 indexed).
I can handle scraping dmesg, but does anyone know how I can find out what the mapping after boot (in a generic way)? ata is always 1 indexed, so sometimes ata1 refers to scsi 1:0:0:0 and sometimes it refers to scsi 0:0:0:0. Any help would be appreciated. - Peter On Thu, Jul 14, 2011 at 10:23 AM, Peter Hamilton <peterghamil...@gmail.com>wrote: > I'm trying to find out what the negotiated speed is on a SATA port. dmesg > reports the negotiated speed, but I'm hoping to find it somewhere in /sys or > /proc (or some other tool). Scraping dmesg is a messy process as I'm > starting with a block device. I would have to trace the block device to the > scsi address and translate that to an ata address. > > Here's the scsi and block device info from dmesg: > > scsi 7:0:0:0: Direct-Access ATA WDC WD1600AAJS-2 01.0 PQ: 0 ANSI: > 5 > sd 7:0:0:0: [sdd] 312581808 512-byte logical blocks: (160 GB/149 GiB) > sd 7:0:0:0: [sdd] Write Protect is off > sd 7:0:0:0: [sdd] Mode Sense: 00 3a 00 00 > sd 7:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't > support DPO or FUA > sd 7:0:0:0: [sdd] Attached SCSI disk > sd 7:0:0:0: Attached scsi generic sg3 type 0 > > Here's the corresponding ata info from dmesg: > > ata7: SATA link up 3.0 Gbps (SStatus 123 SControl 370) > ata7.00: ATA-8: WDC WD1600AAJS-22L7A0, 01.03E01, max UDMA/133 > ata7.00: 312581808 sectors, multi 0: LBA48 NCQ (depth 31/32), AA > ata7.00: configured for UDMA/133 > > > > > Finding the SATA link speed in dmesg would be much cleaner than scraping > dmesg. Does anyone know where I might find that? > > Also, for a SAS HBA, the link speed is not reported to dmesg. Does anyone > know how to find the link speed for a SAS drive? > > Thanks, > > Peter >
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