Bug 15198
| Summary: | CD changer autodetection doesn't work, causing SCSI timeout [PATCH] | ||||||
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| Product: | Base System | Reporter: | Don Lewis <truckman> | ||||
| Component: | kern | Assignee: | Kenneth D. Merry <ken> | ||||
| Status: | Closed FIXED | ||||||
| Severity: | Affects Only Me | ||||||
| Priority: | Normal | ||||||
| Version: | 3.3-STABLE | ||||||
| Hardware: | Any | ||||||
| OS: | Any | ||||||
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Don Lewis wrote... > > >Number: 15198 > >Category: kern > >Synopsis: CD changer autodetection doesn't work, causing SCSI timeout [PATCH] [ ... ] > FreeBSD 3.3-STABLE of the 19991129 vintage with a PIONEER CD-ROM DRM-6324X > LUN-based CD-ROM changer connected via an aic SCSI controller. > > >Description: > > A SCSI bus timeout occurs when the driver attempts to access the > second slot in the CD changer (cd2). If the cdX devices are listed > in /etc/fstab, the machine totally wedges. If no attempt is made > to mount the cdX devices, the machine is otherwise usable. [ ... ] > cd1 at aic0 bus 0 target 6 lun 0 > cd1: <PIONEER CD-ROM DRM-6324X 1.03> Removable CD-ROM SCSI-2 device > cd1: 5.000MB/s transfers (5.000MHz, offset 8) > cd1: cd present [12205 x 2048 byte records] > (cd2:aic0:0:6:1): ccb 0xc0871800 - timed out, phase 84 > cd2 at aic0 bus 0 target 6 lun 1 > cd2: <PIONEER CD-ROM DRM-6324X 1.03> Removable CD-ROM SCSI-2 device > cd2: 5.000MB/s transfers (5.000MHz, offset 8) > cd2: cd present [36007 x 2048 byte records] [ ... ] > >Fix: > > Adding a quirk entry to the driver fixes the problem, even though the > comments say this shouldn't be necessary. Indeed, I'm certainly surprised that adding a quirk fixed the problem. I suppose this device must take a long time to respond to a read capacity. With most changers, it's no big deal if the changer gets switched into the changer scheduling code with lun 1 instead of lun 0. You usually don't see any sort of trouble. With the patch, do the lockups still happen when you boot the machine? I wouldn't expect the patch to have much effect on that, since all LUNs of the changer will be run through the changer scheduling mechanism once the second lun is detected... Unless the CDs are being mounted as they are found. In any case, the lockup shouldn't happen, although finding the lockup might be rather difficult. Can you break into the debugger when the lockup happens and get a stack trace? Ken -- Kenneth Merry ken@kdm.org State Changed From-To: open->analyzed We've got a solution, and some ideas on why this is happening. Responsible Changed From-To: freebsd-bugs->ken My driver, I'll handle it. State Changed From-To: analyzed->closed Patch applied in revision 1.29 scsi_cd.c in -current and revision 1.14.2.8 of scsi_cd.c in RELENG_3. Let me know if you have problems after you update to the new version. |
A SCSI bus timeout occurs when the driver attempts to access the second slot in the CD changer (cd2). If the cdX devices are listed in /etc/fstab, the machine totally wedges. If no attempt is made to mount the cdX devices, the machine is otherwise usable. Copyright (c) 1992-1999 FreeBSD Inc. Copyright (c) 1982, 1986, 1989, 1991, 1993 The Regents of the University of California. All rights reserved. FreeBSD 3.3-STABLE #3: Sun Nov 28 08:45:20 PST 1999 gdonl@gvpc85.gv.tsc.tdk.com:/usr/src/sys/compile/TSC_INTERNAL Timecounter "i8254" frequency 1193182 Hz Timecounter "TSC" frequency 265910120 Hz CPU: Pentium II (265.91-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0x633 Stepping = 3 Features=0x80f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,MMX> real memory = 67108864 (65536K bytes) avail memory = 62078976 (60624K bytes) Preloaded elf kernel "kernel" at 0xc030a000. Preloaded userconfig_script "/boot/kernel.conf" at 0xc030a09c. Pentium Pro MTRR support enabled Probing for devices on PCI bus 0: chip0: <Intel 82440FX (Natoma) PCI and memory controller> rev 0x02 on pci0.0.0 chip1: <Intel 82371SB PCI to ISA bridge> rev 0x01 on pci0.7.0 ide_pci0: <Intel PIIX3 Bus-master IDE controller> rev 0x00 on pci0.7.1 vga0: <Matrox MGA 2164W graphics accelerator> rev 0x00 int a irq 10 on pci0.11.0 xl0: <3Com 3c905-TX Fast Etherlink XL> rev 0x00 int a irq 9 on pci0.15.0 xl0: Ethernet address: 00:60:08:31:f9:87 xl0: autoneg complete, link status good (half-duplex, 10Mbps) ahc0: <Adaptec 2940 Ultra SCSI adapter> rev 0x00 int a irq 10 on pci0.19.0 ahc0: aic7880 Wide Channel A, SCSI Id=7, 16/255 SCBs Probing for devices on the ISA bus: sc0 on isa sc0: VGA color <16 virtual consoles, flags=0x0> atkbdc0 at 0x60-0x6f on motherboard atkbd0 irq 1 on isa psm0 not found sio0 at 0x3f8-0x3ff irq 4 flags 0x10 on isa sio0: type 16550A sio1: configured irq 3 not in bitmap of probed irqs 0 sio1 not found at 0x2f8 fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa fdc0: FIFO enabled, 8 bytes threshold fd0: 1.44MB 3.5in wdc0 not found at 0x1f0 wdc1 not found at 0x170 ppc0 at 0x378 irq 7 on isa ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode lpt0: <generic printer> on ppbus 0 lpt0: Interrupt-driven port ppi0: <generic parallel i/o> on ppbus 0 plip0: <PLIP network interface> on ppbus 0 aic0 at 0x340-0x35f irq 11 on isa aic0: aic6360, disconnection vga0 at 0x3c0-0x3df maddr 0xa0000 msize 131072 on isa npx0 on motherboard npx0: INT 16 interface Waiting 2 seconds for SCSI devices to settle sa0 at aic0 bus 0 target 5 lun 0 sa0: <HP C1557A UL01> Removable Sequential Access SCSI-2 device sa0: 5.000MB/s transfers (5.000MHz, offset 8) pass4 at aic0 bus 0 target 5 lun 1 pass4: <HP C1557A UL01> Removable Changer SCSI-2 device pass4: 5.000MB/s transfers (5.000MHz, offset 8) da0 at ahc0 bus 0 target 0 lun 0 da0: <SEAGATE ST34371N 0484> Fixed Direct Access SCSI-2 device da0: 20.000MB/s transfers (20.000MHz, offset 15), Tagged Queueing Enabled da0: 4148MB (8496884 512 byte sectors: 255H 63S/T 528C) changing root device to da0s1a cd0 at ahc0 bus 0 target 5 lun 0 cd0: <NEC CD-ROM DRIVE:462 1.14> Removable CD-ROM SCSI-2 device cd0: 10.000MB/s transfers (10.000MHz, offset 15) cd0: Attempt to query device size failed: NOT READY, Medium not present WARNING: / was not properly dismounted da1 at ahc0 bus 0 target 1 lun 0 da1: <WDIGTL WDE2170-1807A3 1.80> Fixed Direct Access SCSI-2 device da1: 40.000MB/s transfers (20.000MHz, offset 8, 16bit) da1: 2047MB (4194057 512 byte sectors: 255H 63S/T 261C) cd1 at aic0 bus 0 target 6 lun 0 cd1: <PIONEER CD-ROM DRM-6324X 1.03> Removable CD-ROM SCSI-2 device cd1: 5.000MB/s transfers (5.000MHz, offset 8) cd1: cd present [12205 x 2048 byte records] (cd2:aic0:0:6:1): ccb 0xc0871800 - timed out, phase 84 cd2 at aic0 bus 0 target 6 lun 1 cd2: <PIONEER CD-ROM DRM-6324X 1.03> Removable CD-ROM SCSI-2 device cd2: 5.000MB/s transfers (5.000MHz, offset 8) cd2: cd present [36007 x 2048 byte records] cd3 at aic0 bus 0 target 6 lun 2 cd3: <PIONEER CD-ROM DRM-6324X 1.03> Removable CD-ROM SCSI-2 device cd3: 5.000MB/s transfers (5.000MHz, offset 8) cd3: cd present [211343 x 2048 byte records] cd4 at aic0 bus 0 target 6 lun 3 cd4: <PIONEER CD-ROM DRM-6324X 1.03> Removable CD-ROM SCSI-2 device cd4: 5.000MB/s transfers (5.000MHz, offset 8) cd4: Attempt to query device size failed: NOT READY, Medium not present cd5 at aic0 bus 0 target 6 lun 4 cd5: <PIONEER CD-ROM DRM-6324X 1.03> Removable CD-ROM SCSI-2 device cd5: 5.000MB/s transfers (5.000MHz, offset 8) cd5: Attempt to query device size failed: NOT READY, Medium not present cd6 at aic0 bus 0 target 6 lun 5 cd6: <PIONEER CD-ROM DRM-6324X 1.03> Removable CD-ROM SCSI-2 device cd6: 5.000MB/s transfers (5.000MHz, offset 8) cd6: Attempt to query device size failed: NOT READY, Medium not present cd9660: RockRidge Extension Fix: Adding a quirk entry to the driver fixes the problem, even though the comments say this shouldn't be necessary.