Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750773AbVK3BgD (ORCPT ); Tue, 29 Nov 2005 20:36:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750775AbVK3BgD (ORCPT ); Tue, 29 Nov 2005 20:36:03 -0500 Received: from www.pffamerica.com ([69.222.0.23]:30218 "EHLO usfltd.com") by vger.kernel.org with ESMTP id S1750773AbVK3BgB (ORCPT ); Tue, 29 Nov 2005 20:36:01 -0500 Date: Tue, 29 Nov 2005 19:36:44 -0600 Message-Id: <200511291936.AA2621734@usfltd.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii From: "art" Reply-To: To: CC: Subject: SCSI adaptec 19160 speed - 2.6.14-rt13 - Q for scsi experts X-Mailer: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2651 Lines: 72 SCSI adaptec 19160 speed - 2.6.14-rt13 - Q for scsi experts Attached scsi disk sda at scsi0, channel 0, id 1, lun 0 Vendor: COMPAQ Model: BF14688286 Rev: HPB3 Type: Direct-Access ANSI SCSI revision: 03 scsi0:A:2:0: Tagged Queuing enabled. Depth 64 target0:0:2: Beginning Domain Validation target0:0:2: wide asynchronous. target0:0:2: FAST-80 WIDE SCSI 160.0 MB/s DT (12.5 ns, offset 63) target0:0:2: Ending Domain Validation SCSI device sdb: 286749488 512-byte hdwr sectors (146816 MB) SCSI device sdb: drive cache: write through SCSI device sdb: 286749488 512-byte hdwr sectors (146816 MB) SCSI device sdb: drive cache: write through sdb: sdb1 Attached scsi disk sdb at scsi0, channel 0, id 2, lun 0 Vendor: COMPAQ Model: BF14688286 Rev: HPB3 Type: Direct-Access ANSI SCSI revision: 03 scsi0:A:5:0: Tagged Queuing enabled. Depth 64 target0:0:5: Beginning Domain Validation target0:0:5: wide asynchronous. target0:0:5: FAST-80 WIDE SCSI 160.0 MB/s DT (12.5 ns, offset 63) target0:0:5: Ending Domain Validation SCSI device sdc: 286749488 512-byte hdwr sectors (146816 MB) SCSI device sdc: drive cache: write through SCSI device sdc: 286749488 512-byte hdwr sectors (146816 MB) SCSI device sdc: drive cache: write through sdc: sdc1 Attached scsi disk sdc at scsi0, channel 0, id 5, lun 0 # hdparm -tT /dev/sdb /dev/sdb: Timing cached reads: 2316 MB in 2.00 seconds = 1157.90 MB/sec Timing buffered disk reads: 268 MB in 3.00 seconds = 89.26 MB/sec # hdparm -tT /dev/sdc /dev/sdc: Timing cached reads: 2512 MB in 2.00 seconds = 1255.49 MB/sec Timing buffered disk reads: 268 MB in 3.00 seconds = 89.32 MB/sec # hdparm -tT /dev/sdb & hdparm -tT /dev/sdc & [1] 3314 [2] 3315 /dev/sdb: /dev/sdc: Timing cached reads: Timing cached reads: 1228 MB in 2.00 seconds = 613.88 MB/sec 1316 MB in 1.99 seconds = 659.73 MB/sec Timing buffered disk reads: Timing buffered disk reads: 174 MB in 3.00 seconds = 57.91 MB/sec 170 MB in 3.05 seconds = 55.75 MB/sec ------------------------------------------------------------------------------------------ pci is 66Mhz theoretical throuhput ~ 250MB/s controller adaptec asc-19160 discs are 146GB-15krpm-cheetah one disc transfer 89MB/s adaptec speed with 2 disc on one channel = 57.91+55.75 = 113.66MB/s 71% of 160MB/s channel speed i expected ~90% any clue? xboom - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/