Date: Sat, 31 Oct 1998 20:15:17 -0800 From: David Greenman <dg@root.com> To: "Kenneth D. Merry" <ken@plutotech.com> Cc: vallo@matti.ee, freebsd-scsi@FreeBSD.ORG Subject: Re: AIC-7895 and 20.0MB/s transfers Message-ID: <199811010415.UAA02212@implode.root.com> In-Reply-To: Your message of "Sat, 31 Oct 1998 19:25:34 MST." <199811010225.TAA27464@panzer.plutotech.com>
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>Vallo Kallaste wrote... >> I purchased new motherboard recently which have onboard AIC-7895P >> chip. All is well but dmesg says that I have 20MB/s transfers only. >> When working with old ncr controller I have 40MB/s transfers. Some >> bits from dmesg: ... >Well, I'll ask the obvious question: Is support for Ultra SCSI speeds >enabled in the Adaptec BIOS? (ctrl-A when you boot the machine) Hi, Ken. I'm having the same problem here with a new Tyan 1836DLUAN. Same deal - 7895 chip on the motherboard and an Ultra-2 (LVD) Seagate Cheetah is probing at 10Mhz rather than 40Mhz. On boot -v, it reports: (ahc0 scrolled out of the message buffer, but is identical to ahc1) ahc1: <Adaptec aic7895 Ultra SCSI adapter> rev 0x04 int b irq 10 on pci0.18.1 using shared irq10. ahc1: Reading SEEPROM...done. ahc1: internal 50 cable not present, internal 68 cable not present ahc1: external cable not present ahc1: BIOS eeprom is present ahc1: High byte termination Enabled ahc1: Low byte termination Enabled ahc1: aic7895 Wide Channel B, SCSI Id=7, 16/255 SCBs ahc1: Resetting Channel B ahc1: Downloading Sequencer Program... 384 instructions downloaded ... Waiting 2 seconds for SCSI devices to settle (noperiph:ahc0:0:X:X): SCSI bus reset delivered. 0 SCBs aborted. (noperiph:ahc1:0:X:X): SCSI bus reset delivered. 0 SCBs aborted. ahc1: Selection Timeout on A:0. 1 SCBs aborted ahc0: Selection Timeout on A:1. 1 SCBs aborted ahc1: Selection Timeout on A:1. 1 SCBs aborted ahc0: Selection Timeout on A:2. 1 SCBs aborted ahc1: Selection Timeout on A:2. 1 SCBs aborted ahc0: Selection Timeout on A:3. 1 SCBs aborted ahc1: Selection Timeout on A:3. 1 SCBs aborted ahc0: Selection Timeout on A:4. 1 SCBs aborted ahc1: Selection Timeout on A:4. 1 SCBs aborted ahc0: Selection Timeout on A:5. 1 SCBs aborted ahc1: Selection Timeout on A:5. 1 SCBs aborted ahc0: Selection Timeout on A:6. 1 SCBs aborted ahc1: Selection Timeout on A:6. 1 SCBs aborted ahc0: Selection Timeout on A:8. 1 SCBs aborted ahc1: Selection Timeout on A:8. 1 SCBs aborted ahc0: Selection Timeout on A:9. 1 SCBs aborted ahc1: Selection Timeout on A:9. 1 SCBs aborted ahc0: Selection Timeout on A:10. 1 SCBs aborted ahc1: Selection Timeout on A:10. 1 SCBs aborted ahc0: Selection Timeout on A:11. 1 SCBs aborted ahc1: Selection Timeout on A:11. 1 SCBs aborted ahc0: Selection Timeout on A:12. 1 SCBs aborted ahc1: Selection Timeout on A:12. 1 SCBs aborted ahc0: Selection Timeout on A:13. 1 SCBs aborted ahc1: Selection Timeout on A:13. 1 SCBs aborted ahc0: Selection Timeout on A:14. 1 SCBs aborted ahc1: Selection Timeout on A:14. 1 SCBs aborted ahc0: Selection Timeout on A:15. 1 SCBs aborted ahc0: target 0 using 16bit transfers ahc0: target 0 synchronous at 10.0MHz, offset = 0x8 ahc1: Selection Timeout on A:15. 1 SCBs aborted pass0 at ahc0 bus 0 target 0 lun 0 pass0: <SEAGATE ST39102LW 0005> Fixed Direct Access SCSI2 device pass0: Serial Number NJ12299500002905H40F pass0: 20.0MB/s transfers (10.0MHz, offset 8, 16bit), Tagged Queueing Enabled da0 at ahc0 bus 0 target 0 lun 0 da0: <SEAGATE ST39102LW 0005> Fixed Direct Access SCSI2 device da0: Serial Number NJ12299500002905H40F da0: 20.0MB/s transfers (10.0MHz, offset 8, 16bit), Tagged Queueing Enabled da0: 8683MB (17783240 512 byte sectors: 255H 63S/T 1106C) The Adaptec BIOS is configured properly - all drives are set for 40Mhz negotiation. Termination is set auto. -DG David Greenman Co-founder/Principal Architect, The FreeBSD Project To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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