Date: Tue, 18 Mar 2014 11:01:59 +0100 From: Borja Marcos <borjam@sarenet.es> To: freebsd-scsi@freebsd.org Subject: SATA on SAS and tags Message-ID: <4C5437F0-E612-4907-8D52-6FCB15CC78E1@sarenet.es>
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Hello, I guess this is a bug. I am using SATA SSDs connecting to a SAS = backplane and SAS controller (LSI2008, IT firmware, mps driver) and I've just noticed that CAM claims a maximum of 255 tags.=20 Shouldn't it be 16 using NCQ instead of TCQ? mps0: <LSI SAS2008> port 0xfc00-0xfcff mem = 0xdf2b0000-0xdf2bffff,0xdf2c0000-0xdf2fffff irq 32 at device 0.0 on pci2 mps0: Firmware: 18.00.00.00, Driver: 16.00.00.00-fbsd mps0: IOCCapabilities: = 1285c<ScsiTaskFull,DiagTrace,SnapBuf,EEDP,TransRetry,EventReplay,HostDisc>= camcontrol devlist # camcontrol devlist <SEAGATE ST9146803SS FS64> at scbus0 target 8 lun 0 (pass0,da0) <SEAGATE ST9146803SS FS64> at scbus0 target 9 lun 0 (pass1,da1) <ATA Samsung SSD 840 BB0Q> at scbus0 target 10 lun 0 (da2,pass2) <ATA Samsung SSD 840 AB0Q> at scbus0 target 11 lun 0 (da3,pass3) <ATA Samsung SSD 840 BB0Q> at scbus0 target 12 lun 0 (da4,pass4) <ATA Samsung SSD 840 BB0Q> at scbus0 target 13 lun 0 (pass5,da5) <ATA Samsung SSD 840 BB0Q> at scbus0 target 14 lun 0 (da6,pass6) <ATA Samsung SSD 840 BB0Q> at scbus0 target 15 lun 0 (da7,pass7) <ATA Samsung SSD 840 AB0Q> at scbus0 target 17 lun 0 (da8,pass8) <ATA Samsung SSD 840 BB0Q> at scbus0 target 18 lun 0 (da9,pass9) <ATA Samsung SSD 840 AB0Q> at scbus0 target 19 lun 0 = (da10,pass10) <ATA Samsung SSD 840 AB0Q> at scbus0 target 20 lun 0 = (da11,pass11) <ATA Samsung SSD 840 BB0Q> at scbus0 target 21 lun 0 = (da12,pass12) <ATA Samsung SSD 840 BB0Q> at scbus0 target 25 lun 0 = (da13,pass13) # camcontrol tags da10 -v (pass10:mps0:0:19:0): dev_openings 255 (pass10:mps0:0:19:0): dev_active 0 (pass10:mps0:0:19:0): devq_openings 255 (pass10:mps0:0:19:0): devq_queued 0 (pass10:mps0:0:19:0): held -63 (pass10:mps0:0:19:0): mintags 2 (pass10:mps0:0:19:0): maxtags 255 Thanks! Borja.
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