Randy Schultz wrote:
Hi there,
We just purchased a Dell 860 with these specifics:
- dual core pentium 915, 2.8 GHz, 800MHz FSB
- 2x512 MB 533 MHz DDR2 RAM
- Dell's SAS/SATA drive controller(which is actually an LSILogic)
- their 5IR PCI-Express internal RAID controller
- a pair of 250 GB SATA II's set up RAID 1
After installing 6.2-RELEASE on the system I noticed, while pulling the
ports
collection off the CDROM, that the speed to the drives started out just
fine
but long before the ports collection was installed the transfer rate was
down
to ~35kB/s. Huh. So I started paying closer attention. I installed a
couple
of ports and every time there was anything but miniscule data being
transferred to/from disk the transfer rate bottomed out. I installed the
blogbench port and it confirmed the I/O as tremendously sluggish. I've
attached the output of the blogbench runs. The first is from an old 700
MHz
pc, Acer M25C mobo, with 1 IDE drive just for comparison. The second
data set
is the new Dell. I've also attached the output of dmesg. Everything looks
fine except for the mpt lines. Would those be telling of something
amiss or
are they innocuous barks?
I understand that RAID 1 is not the fastest but I certainly expected it
to be
faster than it is, esp. with hw RAID. Are my expectations too high and
this
is normal?
--
<SNIP>
From the boot messages you have included below it seems that you have a
Dell SAS-5i (Internal PCIe) controller and not a Perc/5[ie].
The SAS-5 known to have very poor performance (1Mb/s 100%busy) under
certain loads (cvsup).
I have CC'd the author of the mpt driver (Matthew Jacob) as he may be
able to shed more light on the problem and time frame to resolution.
Tom
Copyright (c) 1992-2007 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
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FreeBSD 6.2-STABLE #0: Mon May 7 20:16:35 EDT 2007
[EMAIL PROTECTED]:/usr/obj/usr/src/sys/maxu.070507
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) D CPU 2.80GHz (2800.11-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0xf64 Stepping = 4
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36
,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=0xe49d<SSE3,RSVD2,MON,DS_CPL,EST,CNTX-ID,CX16,<b14>,<b15>>
AMD Features=0x20100000<NX,LM>
AMD Features2=0x1<LAHF>
Cores per package: 2
real memory = 1073479680 (1023 MB)
avail memory = 1041326080 (993 MB)
ACPI APIC Table: <DELL PE_SC3 >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
cpu0 (BSP): APIC ID: 0
cpu1 (AP): APIC ID: 1
<SNIP>
mpt0: <LSILogic SAS/SATA Adapter> port 0xec00-0xecff mem
0xfeafc000-0xfeafffff,0xfeae0000-0xf
eaeffff irq 16 at device 8.0 on pci2
mpt0: [GIANT-LOCKED]
mpt0: MPI Version=1.5.13.0
mpt0: mpt_cam_event: 0x16
mpt0: Unhandled Event Notify Frame. Event 0x16 (ACK not required).
mpt0: mpt_cam_event: 0x12
mpt0: Unhandled Event Notify Frame. Event 0x12 (ACK not required).
mpt0: mpt_cam_event: 0x12
mpt0: Unhandled Event Notify Frame. Event 0x12 (ACK not required).
mpt0: mpt_cam_event: 0x16
mpt0: Unhandled Event Notify Frame. Event 0x16 (ACK not required).
<SNIP>
da0 at mpt0 bus 0 target 0 lun 0
da0: <Dell VIRTUAL DISK 1028> Fixed Direct Access SCSI-5 device
da0: 300.000MB/s transfers, Tagged Queueing Enabled
da0: 237464MB (486326272 512 byte sectors: 255H 63S/T 30272C)
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