Linux on PE2950, PV220S and very slow PV124T
Bahadir Kiziltan
bahadir.kiziltan at gmail.com
Fri Aug 22 14:28:26 CDT 2008
set scsi bus speed to 160MB/sec in Adaptec 39320 BIOS and try out.
On Fri, Aug 22, 2008 at 3:41 PM, David B. <haazeloud at gmail.com> wrote:
> Hi,
>
> I've got I/O performance problem during quite some time (several
> mounths) without any solutions for now.
> Especially while writing a LTO3 Tape.
>
> OS : CentOS 5 64bits
>
> Hardware :
> PE 2950
> Intel Xeon 5120
> RAM : 1 GB
> PERC 5/i Integrated (with 6 x 7200rpm SATA HDDs, 2 x RAID 5 arrays (3
> disks per array).
> 39320A Ultra320 with external PV124T (LTO3 tape drive)
> PERC 4/DC with external PV220S (14 x 300 Go SCSI 10000rpm, 2 x RAID 5
> arrays (7 disks per array).
>
> Tape write and read are very slow.
> This was a bit better a mounth ago, since a power outage, system seems
> to be slow, but I can't figure out why !
>
> Tape write :
> Quite simple, reading files from PV220S to LTO3 Tape.
> For a 300 GB of data transfert (lots of files, around 12M), it take
> around 20 hours !
>
> Backup to tape through tar :
> mt -f /dev/st0 setblk 0
> tar -b 128 -cvf /dev/st0 /my_backup_dir
>
> No load on OS during transfert, just tar process !
> No patrol read operation during process.
>
> Omreport seems not to report any problem :
> > omreport chassis
> Health
>
> Main System Chassis
>
> SEVERITY : COMPONENT
> Ok : Fans
> Ok : Intrusion
> Ok : Memory
> Ok : Power Supplies
> Ok : Processors
> Ok : Temperatures
> Ok : Voltages
> Ok : Hardware Log
> Ok : Batteries
>
> > omreport storage controller
> List of Controllers in the system
>
> Controllers
> ID : 0
> Status : Ok
> Name : PERC 4/DC
> Slot ID : PCI Slot 2
> State : Ready
> Firmware Version : 352D
> Minimum Required Firmware Version : Not Applicable
> Driver Version : Not Applicable
> Minimum Required Driver Version : Not Applicable
> Number of Connectors : 2
> Rebuild Rate : 30%
> BGI Rate : Not Applicable
> Check Consistency Rate : Not Applicable
> Reconstruct Rate : Not Applicable
> Alarm State : Enabled
> Cluster Mode : Not Applicable
> SCSI Initiator ID : 7
> Cache Memory Size : 128 MB
> Patrol Read Mode : Auto
> Patrol Read State : Stopped
> Patrol Read Rate : Not Applicable
> Patrol Read Iterations : 161
>
> ID : 1
> Status : Ok
> Name : SCSI Card 39320A Ultra320 SCSI
> Slot ID : PCI Slot 3
> State : Ready
> Firmware Version : Not Applicable
> Minimum Required Firmware Version : Not Applicable
> Driver Version : Not Applicable
> Minimum Required Driver Version : Not Applicable
> Number of Connectors : 2
> Rebuild Rate : Not Applicable
> BGI Rate : Not Applicable
> Check Consistency Rate : Not Applicable
> Reconstruct Rate : Not Applicable
> Alarm State : Not Applicable
> Cluster Mode : Not Applicable
> SCSI Initiator ID : Not Applicable
> Cache Memory Size : Not Applicable
> Patrol Read Mode : Not Applicable
> Patrol Read State : Not Applicable
> Patrol Read Rate : Not Applicable
> Patrol Read Iterations : Not Applicable
>
> ID : 2
> Status : Ok
> Name : PERC 5/i Integrated
> Slot ID : Embedded
> State : Ready
> Firmware Version : 5.2.1-0067
> Minimum Required Firmware Version : Not Applicable
> Driver Version : 00.00.03.15-RH1
> Minimum Required Driver Version : Not Applicable
> Number of Connectors : 2
> Rebuild Rate : 30%
> BGI Rate : 30%
> Check Consistency Rate : 30%
> Reconstruct Rate : 30%
> Alarm State : Not Applicable
> Cluster Mode : Not Applicable
> SCSI Initiator ID : Not Applicable
> Cache Memory Size : 256 MB
> Patrol Read Mode : Auto
> Patrol Read State : Stopped
> Patrol Read Rate : 30%
> Patrol Read Iterations : 54
>
> FW seems to be uptodate.
>
> I/O read on PV220S, seems to be not too bad :
> dd if=/dev/zero of=testfile bs=1M count=2000 && sync
> 2000+0 records in
> 2000+0 records out
> 2097152000 bytes (2.1 GB) copied, 27.4402 seconds, 76.4 MB/s
>
> SCSI chain between 39320A and PV124T looks good :
> cat /proc/scsi/aic79xx/1
> Adaptec AIC79xx driver version: 3.0
> Adaptec 39320A Ultra320 SCSI adapter
> aic7902: Ultra320 Wide Channel A, SCSI Id=7, PCI-X 101-133Mhz, 512 SCBs
> Allocated SCBs: 4, SG List Length: 128
>
> Serial EEPROM:
> 0x17c8 0x17c8 0x17c8 0x17c8 0x17c8 0x17c8 0x17c8 0x17c8
> 0x17c8 0x17c8 0x17c8 0x17c8 0x17c8 0x17c8 0x17c8 0x17c8
> 0x09f4 0x0142 0x2807 0x0010 0xffff 0xffff 0xffff 0xffff
> 0xffff 0xffff 0xffff 0xffff 0xffff 0xffff 0x0430 0xb3f3
>
> Target 0 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Target 1 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Target 2 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Target 3 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Target 4 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Target 5 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Target 6 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Goal: 160.000MB/s transfers (80.000MHz DT, 16bit)
> Curr: 160.000MB/s transfers (80.000MHz DT, 16bit)
> Channel A Target 6 Lun 0 Settings
> Commands Queued 7192757
> Commands Active 0
> Command Openings 1
> Max Tagged Openings 0
> Device Queue Frozen Count 0
> Channel A Target 6 Lun 1 Settings
> Commands Queued 60
> Commands Active 0
> Command Openings 1
> Max Tagged Openings 0
> Device Queue Frozen Count 0
> Target 7 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Target 8 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Target 9 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Target 10 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Target 11 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Target 12 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Target 13 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Target 14 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
> Target 15 Negotiation Settings
> User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS,
> 16bit)
>
> I've tried deadline and CFQ for IO scheduler, quite the same thing...
>
> LTO Tape drive : Compression enable
>
> I've found this that i haven't tried yet...
> http://lists.us.dell.com/pipermail/linux-poweredge/2007-March/029916.html
>
> Did someone have some idea ?
>
> Thank you.
> David
>
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