Hi Why isn't the speed of raid-0 twice of the non-raid devices? I wonder the rate of data should be twice the non-raid, if data transfering from or to on raid device but it is not happening. Even raid device seems to be slower than non-raid. I got four ultra ATA 100 seagate drives 120 GB each. hda, hdb the non-raid regular HDD (see !!!kernel log2) sda is a raid-0 device comprise of to ultra ATA 100 on promise fast track controller(see !!!kernel log3) Here is a math of transfering 1 GB file in different route 1- hda to hdb 50 secs (20.5 MB/s) 2- hda to hda 81 secs (13 MB/s) 3- sda to hda 50 secs (20.5 MB/s) 4- sda to sda 81 secs (13 MB/s) 5- hda to sda 77 secs (13 MB/s) *These test has been taken so many times and the result are very close. Following are more details I am using the RH8 on Intel S845WDE-1 having Promise 20267 on board controller and 512 DDR266 RAM. The bios is configured with array of 2 disk on raid 0. The both harddrives are conneted with different channel as Master Drives (See # cat /proc/ide/pdc202xx) I had intall RH8 as per given instruction in readme on promise driver that is booting linux with Boot: linux ide0=ox... expert (see !!!kernel log1) and install the driver downloaded from the intel downloads page. At the time of partition I chose disk druid, formated whole free space of /dev/sda with ext3. After completion of installation i found sda as unformated. (Why?) I had formated the raid device by using the mke2fs command # mke2fs -j -R stride=16 /dev/sda Before Installation these Harddrives are configure on windows 2000 professional with same H/W configuration, providing faster even twice the throughput. I had check HDD the are well when I used them as regular drives. No Hardware fault any more! I dont have option to switch on the Linux software raid. I must use the Hardware/Firmware Raid on my board. ################### Kernel Setup Log ################ Linux version 2.4.18-14 (bhcompile@xxxxxxxxxxxxxxxxxxxxxxxxxx) (gcc version 3.2 20020903 (Red Hat Linux 8.0 3.2-7)) #1 Wed Sep 4 13:35:50 EDT 2002 BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 000000000009bc00 (usable) BIOS-e820: 000000000009bc00 - 000000000009c000 (reserved) BIOS-e820: 00000000000e8000 - 0000000000100000 (reserved) BIOS-e820: 0000000000100000 - 000000001ffc0000 (usable) BIOS-e820: 000000001ffc0000 - 000000001fff8000 (ACPI data) BIOS-e820: 000000001fff8000 - 0000000020000000 (ACPI NVS) BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved) BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) BIOS-e820: 00000000ffb80000 - 00000000ffc00000 (reserved) BIOS-e820: 00000000fff00000 - 0000000100000000 (reserved) 0MB HIGHMEM available. 511MB LOWMEM available. On node 0 totalpages: 131008 zone(0): 4096 pages. zone(1): 126912 pages. zone(2): 0 pages. !!! Kernel log1 Kernel command line: ro root=LABEL=/ ide0=0x1f0,0x3f6 ide1=0x170,0x376 ide2=0 ide3=0 ide4=0 ide5=0 ide6=0 ide7=0 ide8=0 ide9=0 ide_setup: ide0=0x1f0,0x3f6 ide_setup: ide1=0x170,0x376 ide_setup: ide2=0 ide_setup: ide3=0 ide_setup: ide4=0 ide_setup: ide5=0 ide_setup: ide6=0 ide_setup: ide7=0 ide_setup: ide8=0 ide_setup: ide9=0 Initializing CPU#0 Detected 2392.070 MHz processor. Speakup v-1.00 CVS: Tue Jun 11 14:22:53 EDT 2002 : initialized Console: colour VGA+ 80x25 Calibrating delay loop... 4750.85 BogoMIPS Memory: 511088k/524032k available (1326k kernel code, 10364k reserved, 999k data, 212k init, 0k highmem) Dentry cache hash table entries: 65536 (order: 7, 524288 bytes) Inode cache hash table entries: 32768 (order: 6, 262144 bytes) Mount cache hash table entries: 8192 (order: 4, 65536 bytes) ramfs: mounted with options: <defaults> ramfs: max_pages=64158 max_file_pages=0 max_inodes=0 max_dentries=64158 Buffer cache hash table entries: 32768 (order: 5, 131072 bytes) Page-cache hash table entries: 131072 (order: 7, 524288 bytes) CPU: Before vendor init, caps: bfebfbff 00000000 00000000, vendor = 0 CPU: L1 I cache: 0K, L1 D cache: 8K CPU: L2 cache: 512K CPU: After vendor init, caps: bfebfbff 00000000 00000000 00000000 Intel machine check architecture supported. Intel machine check reporting enabled on CPU#0. CPU: After generic, caps: bfebfbff 00000000 00000000 00000000 CPU: Common caps: bfebfbff 00000000 00000000 00000000 CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz stepping 07 Enabling fast FPU save and restore... done. Enabling unmasked SIMD FPU exception support... done. Checking 'hlt' instruction... OK. POSIX conformance testing by UNIFIX mtrr: v1.40 (20010327) Richard Gooch (rgooch@xxxxxxxxxxxxx) mtrr: detected mtrr type: Intel PCI: PCI BIOS revision 2.10 entry at 0xfda95, last bus=2 PCI: Using configuration type 1 PCI: Probing PCI hardware Unknown bridge resource 0: assuming transparent PCI: Using IRQ router PIIX [8086/2440] at 00:1f.0 isapnp: Scanning for PnP cards... isapnp: No Plug & Play device found speakup: initialized device: /dev/synth, node (MAJOR 10, MINOR 25) Linux NET4.0 for Linux 2.4 Based upon Swansea University Computer Society NET3.039 Initializing RT netlink socket apm: BIOS not found. Starting kswapd VFS: Diskquotas version dquot_6.5.0 initialized pty: 2048 Unix98 ptys configured Serial driver version 5.05c (2001-07-08) with MANY_PORTS MULTIPORT SHARE_IRQ SERIAL_PCI ISAPNP enabled ttyS0 at 0x03f8 (irq = 4) is a 16550A ttyS1 at 0x02f8 (irq = 3) is a 16550A Real Time Clock Driver v1.10e oprofile: can't get RTC I/O Ports block: 992 slots per queue, batch=248 Uniform Multi-Platform E-IDE driver Revision: 6.31 ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx PIIX4: IDE controller on PCI bus 00 dev f9 PIIX4: chipset revision 5 PIIX4: not 100% native mode: will probe irqs later ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hdaMA, hdbMA PDC20267: IDE controller on PCI bus 02 dev 70 PCI: Found IRQ 9 for device 02:0e.0 PDC20267: chipset revision 2 PDC20267: not 100% native mode: will probe irqs later PDC20267: (U)DMA Burst Bit ENABLED Primary MASTER Mode Secondary MASTER Mode. PDC20267: too many IDE interfaces, no room in table PDC20267: too many IDE interfaces, no room in table PDC20267: neither IDE port enabled (BIOS) !!!kernel log2 hda: ST3120022A, ATA DISK drive hdb: ST3120022A, ATA DISK drive ide2: ports already in use, skipping probe ide3: ports already in use, skipping probe ide4: ports already in use, skipping probe ide5: ports already in use, skipping probe ide6: ports already in use, skipping probe ide7: ports already in use, skipping probe ide8: ports already in use, skipping probe ide9: ports already in use, skipping probe ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 blk: queue c03c0004, I/O limit 4095Mb (mask 0xffffffff) blk: queue c03c0004, I/O limit 4095Mb (mask 0xffffffff) hda: 234441648 sectors (120034 MB) w/2048KiB Cache, CHS=14593/255/63, UDMA(100) blk: queue c03c0140, I/O limit 4095Mb (mask 0xffffffff) blk: queue c03c0140, I/O limit 4095Mb (mask 0xffffffff) hdb: 234441648 sectors (120034 MB) w/2048KiB Cache, CHS=14593/255/63, UDMA(100) ide-floppy driver 0.99.newide Partition check: hda: hda1 hda2 hda3 hdb: unknown partition table FDC 0 is a post-1991 82077 NET4: Frame Diverter 0.46 RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize ide-floppy driver 0.99.newide md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27 md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. NET4: Linux TCP/IP 1.0 for NET4.0 IP Protocols: ICMP, UDP, TCP, IGMP IP: routing cache hash table of 4096 buckets, 32Kbytes TCP: Hash tables configured (established 32768 bind 65536) Linux IP multicast router 0.06 plus PIM-SM NET4: Unix domain sockets 1.0/SMP for Linux NET4.0. RAMDISK: Compressed image found at block 0 Freeing initrd memory: 241k freed VFS: Mounted root (ext2 filesystem). SCSI subsystem driver Revision: 1.00 kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2 !!!kernel log3 Promise FastTrak Series Linux Driver Version 1.2.0.15 scsi0 : FASTTRAK Vendor: Promise Model: 2+0 Stripe/RAID0 Rev: 1.10 Type: Direct-Access ANSI SCSI revision: 02 Attached scsi disk sda at scsi0, channel 0, id 0, lun 0 SCSI device sda: 468882944 512-byte hdwr sectors (240068 MB) sda: unknown partition table Journalled Block Device driver loaded kjournald starting. Commit interval 5 seconds EXT3-fs: mounted filesystem with ordered data mode. Freeing unused kernel memory: 212k freed usb.c: registered new driver usbdevfs usb.c: registered new driver hub usb-uhci.c: $Revision: 1.275 $ time 13:44:31 Sep 4 2002 usb-uhci.c: High bandwidth mode enabled PCI: Found IRQ 11 for device 00:1f.2 PCI: Sharing IRQ 11 with 02:0d.0 PCI: Setting latency timer of device 00:1f.2 to 64 usb-uhci.c: USB UHCI at I/O 0xef40, IRQ 11 usb-uhci.c: Detected 2 ports usb.c: new USB bus registered, assigned bus number 1 hub.c: USB hub found hub.c: 2 ports detected PCI: Found IRQ 10 for device 00:1f.4 PCI: Setting latency timer of device 00:1f.4 to 64 usb-uhci.c: USB UHCI at I/O 0xef80, IRQ 10 usb-uhci.c: Detected 2 ports usb.c: new USB bus registered, assigned bus number 2 hub.c: USB hub found hub.c: 2 ports detected usb-uhci.c: v1.275:USB Universal Host Controller Interface driver usb.c: registered new driver hiddev usb.c: registered new driver hid hid-core.c: v1.8.1 Andreas Gal, Vojtech Pavlik <vojtech@xxxxxxx> hid-core.c: USB HID support drivers mice: PS/2 mouse device common for all mice EXT3 FS 2.4-0.9.18, 14 May 2002 on ide0(3,1), internal journal Adding Swap: 1052248k swap-space (priority -1) kjournald starting. Commit interval 5 seconds EXT3 FS 2.4-0.9.18, 14 May 2002 on sd(8,0), internal journal EXT3-fs: mounted filesystem with ordered data mode. kjournald starting. Commit interval 5 seconds EXT3 FS 2.4-0.9.18, 14 May 2002 on ide0(3,2), internal journal EXT3-fs: mounted filesystem with ordered data mode. kjournald starting. Commit interval 5 seconds EXT3-fs warning: maximal mount count reached, running e2fsck is recommended EXT3 FS 2.4-0.9.18, 14 May 2002 on ide0(3,64), internal journal EXT3-fs: mounted filesystem with ordered data mode. ################### Other Maths ################### ---------------------------------------------------------------------------------- # cat /proc/scsi/scsi Attached devices: Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: Promise Model: 2+0 Stripe/RAID0 Rev: 1.10 Type: Direct-Access ANSI SCSI revision: 02 ---------------------------------------------------------------------------------- # cat /proc/pci ... Bus 2, device 14, function 0: RAID bus controller: Promise Technology, Inc. 20267 (rev 2). IRQ 9. Master Capable. Latency=32. I/O at 0xdff0 [0xdff7]. I/O at 0xdfe4 [0xdfe7]. I/O at 0xdfa8 [0xdfaf]. I/O at 0xdfe0 [0xdfe3]. I/O at 0xdf00 [0xdf3f]. Non-prefetchable 32 bit memory at 0xfeaa0000 [0xfeabffff]. ... ---------------------------------------------------------------------------------- # cat /proc/ide/pdc202xx PDC20267 Chipset. ------------------------------- General Status --------------------------------- Burst Mode : enabled Host Mode : Normal Bus Clocking : 66 External IO pad select : 10 mA Status Polling Period : 0 Interrupt Check Status Polling Delay : 0 --------------- Primary Channel ---------------- Secondary Channel ------------- enabled enabled 66 Clocking disabled disabled Mode MASTER Mode MASTER FIFO Empty FIFO Empty --------------- drive0 --------- drive1 -------- drive0 ---------- drive1 ------ DMA enabled: no no no no DMA Mode: UDMA 4 NOTSET UDMA 4 NOTSET PIO Mode: PIO 4 NOTSET PIO 4 NOTSET ---------------------------------------------------------------------------------- # cat /proc/partitions major minor #blocks name rio rmerge rsect ruse wio wmerge wsect wuse running use aveq 8 0 234441472 sda 102931 2266114 18952320 1941126 169412 4789483 39672208 2521385 0 1679126 4815910 3 0 117220824 hda 158268 1985197 17147260 4264425 47901 566852 4919776 5416146 -3 3892083 6373799 3 1 4192933 hda1 13028 18793 254546 83560 12124 72068 675120 3027902 0 263269 3113320 3 2 111973050 hda2 145229 1966373 16892594 4180806 35777 494784 4244656 2388244 0 590626 6584490 3 3 1052257 hda3 9 25 104 41 0 0 0 0 0 41 41 3 64 117220824 hdb 102094 1473798 12607106 2129949 85597 1230469 10528808 3382836 -3 3901315 2224366 ------------------------------------------------------------------------------------------ # hdparm -Tt /dev/hda /dev/hda: Timing buffer-cache reads: 128 MB in 0.36 seconds =358.14 MB/sec Timing buffered disk reads: 64 MB in 1.40 seconds = 45.70 MB/sec ------------------------------------------------------------------------------------------ # hdparm -Tt /dev/hdb /dev/hdb: Timing buffer-cache reads: 128 MB in 0.34 seconds =374.52 MB/sec Timing buffered disk reads: 64 MB in 1.21 seconds = 52.68 MB/sec ------------------------------------------------------------------------------------------ # hdparm -Tt /dev/sda /dev/sda: Timing buffer-cache reads: 128 MB in 0.35 seconds =368.20 MB/sec Timing buffered disk reads: 64 MB in 0.96 seconds = 66.47 MB/sec Thats all I would appreciate any help. There are several other question marks but right now I required help to solve the problem mentioned. Malik Plz apologize for the long message __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage! http://promotions.yahoo.com/new_mail
