Haven't done it yet but will this weekend. I am not a guru but find it hard to believe that I can get greater transfer speeds between machines than I can within the actual machine. That just makes no sense to me. I have an XP box here and will be testing it with the same drives before I do anything. I suspect that those speeds will be different. If they are not then ... well I will accept that it is not a linux issue. Also I took the drives out and moved them to an old Hardy box and the parm test resutls were even higher (around the 70's for two of the disks and 40's for the one that is slower). While I agree that placement on the disk is important and recognize the affects of the mechanical side of things I again find it hard to accept that there is a 85% drop off due to inefficiency. Also one of the disks I use is nearly clean which begs the question. I kind of live by the rule that if there is even one exception to the hypothesis that you need a new hypothesis :)
I will let you know what I find out and appreciate the other comments you passed along. BTW, not sure that if you booted from the live disk that will count as an accurate test. I get 1-2 mb throughput going to a USB so why should we see nearly that internal? Also would note that I have have seen many, many threads on this and have even seen (not sure I can place it now) the Ubuntu team admit that there is an issue. On Mon, Feb 16, 2009 at 12:38 PM, ZhangInSeattle <yzhang...@gmail.com>wrote: > Thanks stat! > > Yes, I used the upgrade tool to install Ibex.. > > Did you try to do a clean install and fix the issue? > > (I remember that I tried to boot from the clean 8.10 CD and mount the > same disk to test the speed. The speed is the same as I boot from my > hard drive. So it seemed the clean install might not work for me. Anyway > I'd like to hear if you succeeded.) > > -- > [regression]Slow disk transfer rate on Hardy > https://bugs.launchpad.net/bugs/216878 > You received this bug notification because you are a direct subscriber > of the bug. > > Status in "linux" source package in Ubuntu: Triaged > > Bug description: > Hi, > upgrading from Gutsy to Hardy I've seen a considerable HD transfer rate > slowdown. > > I have a machine with two IDE disks, both are udma5 capable. In Gutsy, they > were recognised as 'hd[ab]' and I with hdparm sequential thoughput was: > > /dev/hdb: > Timing buffered disk reads: 172 MB in 3.01 seconds = 57.19 MB/sec > > which is quite correct for that kind of drive. > > In Hardy, they are recognized as 'sd[ab]', and the performance regarding > transfer rate is LESS THAN HALF: > > /dev/sdb: > Timing buffered disk reads: 78 MB in 3.01 seconds = 25.92 MB/sec > > That slowdown is visible also during file transfer operations, obviously. > One thing I've noticed is that in the dmesg, my drive is set at UDMA/33, and > also hdparm reports that udma2 is currently configured: > > sudo hdparm -i /dev/sdb > > /dev/sdb: > > Model=WDC WD2500JB-00GVC0 , FwRev=08.02D08, SerialNo= > WD-WCAL78023606 > Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq } > RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=74 > BuffType=DualPortCache, BuffSize=8192kB, MaxMultSect=16, MultSect=?16? > CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=488397168 > IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} > PIO modes: pio0 pio1 pio2 pio3 pio4 > DMA modes: mdma0 mdma1 mdma2 > UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5 > AdvancedPM=no WriteCache=enabled > Drive conforms to: Unspecified: ATA/ATAPI-1,2,3,4,5,6 > > * signifies the current active mode > > I've seen a number of users complaining about that, a number of bugs with > status Incomplete or Release Fixed. I can say that with the latest Hardy > patches (as of now), the problem is still there. Will that be fixed before > the final release? If not, that can be a huge performance penalty! > > Here are some infos. I'm willing to help to solve the problem, just ask if > you need any info. > s...@ste-ubuntu:~$ lsb_release -rd > Description: Ubuntu hardy (development branch) > Release: 8.04 > > Pertinent dmesg output: > > [ 35.085132] libata version 3.00 loaded. > [ 35.460830] pata_via 0000:00:11.1: version 0.3.3 > [ 35.463781] scsi0 : pata_via > [ 35.465345] scsi1 : pata_via > [ 35.465441] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xcc00 irq > 14 > [ 35.465446] ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xcc08 irq > 15 > [ 35.637026] ata1.00: ATA-6: Maxtor 5T030H3, TAH71DP0, max UDMA/100 > [ 35.637034] ata1.00: 60030432 sectors, multi 16: LBA > [ 35.638417] ata1.01: ATA-6: WDC WD2500JB-00GVC0, 08.02D08, max UDMA/100 > [ 35.638424] ata1.01: 488397168 sectors, multi 16: LBA48 > [ 35.638446] ata1.00: limited to UDMA/33 due to 40-wire cable > [ 35.638450] ata1.01: limited to UDMA/33 due to 40-wire cable > [ 35.652916] ata1.00: configured for UDMA/33 > [ 35.669962] ata1.01: configured for UDMA/33 > [ 36.136471] ata2.00: ATAPI: LG DVD-ROM DRD-8160B, 1.01, max > UDMA/33 > [ 36.136502] ata2.01: ATAPI: HL-DT-ST GCE-8160B, 1.02, max MWDMA2 > [ 36.300210] ata2.00: configured for UDMA/33 > [ 36.464034] ata2.01: configured for MWDMA2 > [ 36.464239] scsi 0:0:0:0: Direct-Access ATA Maxtor 5T030H3 > TAH7 PQ: 0 ANSI: 5 > [ 36.464959] scsi 0:0:1:0: Direct-Access ATA WDC WD2500JB-00G > 08.0 PQ: 0 ANSI: 5 > > Kernel: > > Linux ste-ubuntu 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 > GNU/Linux > > For other info, just let me know! BTW, congrats for the GREAT WORK!!! > -- [regression]Slow disk transfer rate on Hardy https://bugs.launchpad.net/bugs/216878 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
