On Mon, 19 Aug 2013 15:41:15 -0700, Com Developer said: > Is there any way to reverse map device name /dev/sda to a the ata_host > structure the drive is attached to? What problem are you trying to solve with this reverse mapping? (Hint - I'm not convinced that all devices named /dev/sd* have an ata_host structure. I'm reasonably sure that the large disk arrays I have on some systems at work are *not* ATA, as they present as SCSI fiberchannel devices. % ls -l /dev/sdaaw brw-r----- 1 root disk 133, 576 Aug 17 07:57 /dev/sdaaw and dmesg tells me: Vendor: IBM Model: DCS9550 Rev: 4.03 Type: Direct-Access ANSI SCSI revision: 05 sdaaw : very big device. try to use READ CAPACITY(16). SCSI device sdaaw: 15628087296 512-byte hdwr sectors (8001581 MB) sdaaw: Write Protect is off sdaaw: Mode Sense: a7 00 10 08 SCSI device sdaaw: drive cache: write through w/ FUA sdaaw : very big device. try to use READ CAPACITY(16). SCSI device sdaaw: 15628087296 512-byte hdwr sectors (8001581 MB) sdaaw: Write Protect is off sdaaw: Mode Sense: a7 00 10 08 SCSI device sdaaw: drive cache: write through w/ FUA sdaaw: unknown partition table sd 3:0:7:96: Attached scsi disk sdaaw sd 3:0:7:96: Attached scsi generic sg731 type 0 I'm suspecting there's no ata_host involved here, as we never notice it as an ATA drive. (And no, that device name isn't a boo-boo - the box really *does* have visibility to 768 8T LUNs (OK, so it's actually 8 fiberchannel paths to 96 LUNs. ;)
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