aic7xxx version 5.1.15 works
The above later version of aic7xxx gives error message:
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Detected scsi removable disk sdd at scsi1, channel 0, id 5, lun 0
(scsi1:0:6:0) Synchronous at 10.0 Mbyte/sec, offset 15.
  Vendor: Traxdata  Model: CDR4120           Rev: 5.0N
  Type:   CD-ROM                             ANSI SCSI revision: 02
scsi: aborting command due to timeout: pid 25, scsi 1, channel 0, id 6,
lun 0
Test Unit Ready 00 00 00 00 00
__________________________________


Included please find my file  /proc/scsi/aic7xxx/1 in the case of
aic7xxx version 5.1.15 :



Adaptec AIC7xxx driver version: 5.1.15/3.2.4
Compile Options:
  TCQ Enabled By Default : Disabled
  AIC7XXX_PROC_STATS     : Enabled
  AIC7XXX_RESET_DELAY    : 5

Adapter Configuration:
           SCSI Adapter: Adaptec AIC-7850 SCSI host adapter
                           Narrow Controller
    PCI MMAPed I/O Base: 0xfedff000
 Adapter SEEPROM Config: SEEPROM found and used.
      Adaptec SCSI BIOS: Disabled
                    IRQ: 3
                   SCBs: Active 0, Max Active 1,
                         Allocated 15, HW 3, Page 255
             Interrupts: 107
      BIOS Control Word: 0x0100
   Adapter Control Word: 0x001d
   Extended Translation: Disabled
Disconnect Enable Flags: 0x00ff
 Tag Queue Enable Flags: 0x0000
Ordered Queue Tag Flags: 0x0000
Default Tag Queue Depth: 8
    Tagged Queue By Device array for aic7xxx host instance 1:
      {255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255}
    Actual queue depth per device for aic7xxx host instance 1:
      {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}

Statistics:

(scsi1:0:4:0)
  Device using Narrow/Sync transfers at 5.0 MByte/sec, offset 15
  Transinfo settings: current(50/15/0/0), goal(25/15/0/0), user(25/15/0/0)
  Total transfers 0 (0 reads and 0 writes)
             < 2K      2K+     4K+     8K+    16K+    32K+    64K+   128K+
   Reads:       0       0       0       0       0       0       0       0
  Writes:       0       0       0       0       0       0       0       0


(scsi1:0:5:0)
  Device using Narrow/Async transfers.
  Transinfo settings: current(0/0/0/0), goal(0/0/0/0), user(25/15/0/0)
  Total transfers 0 (0 reads and 0 writes)
             < 2K      2K+     4K+     8K+    16K+    32K+    64K+   128K+
   Reads:       0       0       0       0       0       0       0       0
  Writes:       0       0       0       0       0       0       0       0


(scsi1:0:6:0)
  Device using Narrow/Sync transfers at 10.0 MByte/sec, offset 15
  Transinfo settings: current(25/15/0/0), goal(25/15/0/0), user(25/15/0/0)
  Total transfers 0 (0 reads and 0 writes)
             < 2K      2K+     4K+     8K+    16K+    32K+    64K+   128K+
   Reads:       0       0       0       0       0       0       0       0
  Writes:       0       0       0       0       0       0       0       0


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