Even though /proc/scsi says these are on the same channell, I can tell you
that the two drives are on one cable/connector (80 pin I think) with ther
CDROM on a seperate 50 pin cable. As far as I know, this means they are on
seperate channels. For completeness, I am also showing you hte "new" setup
which is similarily configured.
"old" (with slower than expected performance)
[root@rabbit /root]# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: IBM Model: DDRS-39130D Rev: DC1B
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 06 Lun: 00
Vendor: TOSHIBA Model: CD-ROM XM-6401TA Rev: 1009
Type: CD-ROM ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 08 Lun: 00
Vendor: IBM Model: DDRS-39130D Rev: DC1B
Type: Direct-Access ANSI SCSI revision: 02
[root@rabbit /root]# cat /proc/scsi/aic7xxx/0
Adaptec AIC7xxx driver version: 5.1.31/3.2.4
Compile Options:
TCQ Enabled By Default : Disabled
AIC7XXX_PROC_STATS : Enabled
AIC7XXX_RESET_DELAY : 5
Adapter Configuration:
SCSI Adapter: Adaptec AHA-294X Ultra2 SCSI host adapter
Ultra-2 LVD/SE Wide Controller at PCI 0/10/0
PCI MMAPed I/O Base: 0xde000000
Adapter SEEPROM Config: SEEPROM found and used.
Adaptec SCSI BIOS: Enabled
IRQ: 10
SCBs: Active 0, Max Active 3,
Allocated 15, HW 32, Page 255
Interrupts: 977565
BIOS Control Word: 0x10a6
Adapter Control Word: 0x1c5d
Extended Translation: Enabled
Disconnect Enable Flags: 0xffff
Ultra Enable Flags: 0x0000
Tag Queue Enable Flags: 0x0000
Ordered Queue Tag Flags: 0x0000
Default Tag Queue Depth: 8
Tagged Queue By Device array for aic7xxx host instance 0:
{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 0:
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
Statistics:
(scsi0:0:0:0)
Device using Wide/Sync transfers at 80.0 MByte/sec, offset 15
Transinfo settings: current(10/15/1/0), goal(10/127/1/0),
user(10/127/1/0)
Total transfers 424991 (232536 reads and 192455 writes)
< 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+
Reads: 153852 9946 19228 8751 5666 3798 31295 0
Writes: 139151 30942 15058 3866 1325 730 1383 0
(scsi0:0:6:0)
Device using Narrow/Sync transfers at 20.0 MByte/sec, offset 16
Transinfo settings: current(12/16/0/0), goal(10/127/0/0),
user(10/127/1/0)
Total transfers 99 (99 reads and 0 writes)
< 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+
Reads: 1 12 3 0 14 10 59 0
Writes: 0 0 0 0 0 0 0 0
(scsi0:0:8:0)
Device using Wide/Sync transfers at 80.0 MByte/sec, offset 15
Transinfo settings: current(10/15/1/0), goal(10/127/1/0),
user(10/127/1/0)
Total transfers 251270 (227674 reads and 23596 writes)
< 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+
Reads: 35395 4774 24789 34887 20102 30943 76784 0
Writes: 20971 1891 568 67 43 9 47 0
"new"
cgalpin@kanga 20001104]$ cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: SEAGATE Model: ST318436LW Rev: 0010
Type: Direct-Access ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 02 Lun: 00
Vendor: YAMAHA Model: CRW4416S Rev: 1.0j
Type: CD-ROM ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 04 Lun: 00
Vendor: TOSHIBA Model: CD-ROM XM-6401TA Rev: 1001
Type: CD-ROM ANSI SCSI revision: 02
[cgalpin@kanga 20001104]$ cat /proc/scsi/aic7xxx/0
Adaptec AIC7xxx driver version: 5.1.31/3.2.4
Compile Options:
TCQ Enabled By Default : Disabled
AIC7XXX_PROC_STATS : Enabled
AIC7XXX_RESET_DELAY : 5
Adapter Configuration:
SCSI Adapter: Adaptec AIC-7892 Ultra 160/m SCSI host adapter
Ultra-160/m LVD/SE Wide Controller at PCI
0/14/0
PCI MMAPed I/O Base: 0xeffff000
Adapter SEEPROM Config: SEEPROM found and used.
Adaptec SCSI BIOS: Enabled
IRQ: 10
SCBs: Active 0, Max Active 3,
Allocated 15, HW 32, Page 255
Interrupts: 4409753
BIOS Control Word: 0xb8f4
Adapter Control Word: 0x7c5d
Extended Translation: Enabled
Disconnect Enable Flags: 0xffff
Ultra Enable Flags: 0x0000
Tag Queue Enable Flags: 0x0000
Ordered Queue Tag Flags: 0x0000
Default Tag Queue Depth: 8
Tagged Queue By Device array for aic7xxx host instance 0:
{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 0:
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
Statistics:
(scsi0:0:0:0)
Device using Wide/Sync transfers at 160.0 MByte/sec, offset 31
Transinfo settings: current(9/31/1/2), goal(9/127/1/2), user(9/127/1/2)
Total transfers 377681 (168154 reads and 209527 writes)
< 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+
Reads: 6 0 126377 11817 11874 6209 11871 0
Writes: 0 0 141836 48266 6396 1685 11344 0
(scsi0:0:2:0)
Device using Narrow/Sync transfers at 8.0 MByte/sec, offset 31
Transinfo settings: current(30/31/0/0), goal(10/127/0/0),
user(9/127/1/2)
Total transfers 1 (1 reads and 0 writes)
< 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+
Reads: 1 0 0 0 0 0 0 0
Writes: 0 0 0 0 0 0 0 0
(scsi0:0:4:0)
Device using Narrow/Sync transfers at 20.0 MByte/sec, offset 16
Transinfo settings: current(12/16/0/0), goal(12/127/0/0),
user(12/127/0/0)
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
On Sat, 4 Nov 2000, Jamin Collins wrote:
> What devices do you have on the SCSI chain? For most controllers, if you
> mix SCSI types, the entire chain drops to the lowest SCSI type.
>
> Jamin W. Collins
>
> -----Original Message-----
> From: Charles Galpin [mailto:[EMAIL PROTECTED]]
> Sent: Saturday, November 04, 2000 11:00 AM
> To: '[EMAIL PROTECTED]'
> Subject: RE: hdparam (was Re: Linux Network Performance Slower Than NT,
> p lease help)
>
>
> which would be 24 MB/sec for my 80MB/sec max. I am getting more like
> 15%. I guess that's my gripe then. Any tips on how to get closer to 30%?
>
> I never expected 80 MB/sec, but a lot more than 13 MB/sec.
>
> charles
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