[4248] in linux-scsi channel archive
Normal CPU load during backup?
daemon@ATHENA.MIT.EDU (Clint Bauer)
Sun Jun 28 23:12:45 1998
Date: Sun, 28 Jun 1998 22:14:20 +0000
From: Clint Bauer <bauer@nationwide.net>
To: linux-scsi@vger.rutgers.edu
While doing some test backups with my new scsi tape drive, I noticed
that the load seemed to stay about 0.8 - 0.95 during the backup. Since
the source and destination devices are both scsi, this seemed higher
that I would have thought. I understand that in my case, the data has
to physically transfer between the wide and non-wide cabling, but I
would have thought that would be independent of the host CPU and would
be handled completely by the card.
Is this about what everyone else sees, or do I just have unrealistic
expectations?
BTW, thanks to Leonard for the driver, I especially like the detailed
info under /proc.
Pentium II 300 MHZ 64MB
2.0.33
scsi:
***** BusLogic SCSI Driver Version 2.0.11 of 31 January 1998 *****
scsi: Copyright 1995 by Leonard N. Zubkoff <lnz@dandelion.com>
scsi0: Configuring BusLogic Model BT-958 PCI Wide Ultra SCSI Host
Adapter
scsi0: Firmware Version: 5.06I, I/O Address: 0xD000, IRQ Channel:
10/Level
scsi0: PCI Bus: 0, Device: 11, Address: 0xE0800000, Host Adapter SCSI
ID: 7
scsi0: Parity Checking: Enabled, Extended Translation: Enabled
scsi0: Synchronous Negotiation: UFUUFUU#UUUUUUUU, Wide Negotiation:
YNYYNYY#YYYYYYYY
scsi0: Disconnect/Reconnect: Enabled, Tagged Queuing: Enabled
scsi0: Scatter/Gather Limit: 128 of 8192 segments, Mailboxes: 211
scsi0: Driver Queue Depth: 211, Host Adapter Queue Depth: 192
scsi0: Tagged Queue Depth: Automatic, Untagged Queue Depth: 3
scsi0: Error Recovery Strategy: Default, SCSI Bus Reset: Enabled
scsi0: SCSI Bus Termination: High Enabled, SCAM: Enabled, Level 1
scsi0: *** BusLogic BT-958 Initialized Successfully ***
scsi0 : BusLogic BT-958
scsi : 1 host.
Vendor: QUANTUM Model: VIKING 2.3 WSE Rev: 880R
Type: Direct-Access ANSI SCSI revision: 02
Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
Vendor: TOSHIBA Model: CD-ROM XM-6201TA Rev: 1030
Type: CD-ROM ANSI SCSI revision: 02
Detected scsi CD-ROM sr0 at scsi0, channel 0, id 1, lun 0
Vendor: Seagate Model: STT8000N Rev: 3.22
Type: Sequential-Access ANSI SCSI revision: 02
scsi0: Target 0: Queue Depth 28, Wide Synchronous at 40.0 MB/sec, offset
15
scsi0: Target 1: Queue Depth 3, Synchronous at 10.0 MB/sec, offset 15
scsi0: Target 4: Queue Depth 3, Synchronous at 10.0 MB/sec, offset 15
SCSI device sda: hdwr sector= 512 bytes. Sectors= 4446801 [2171 MB] [2.2
GB]
Clint
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