September 26, 201015 yr In my syslog, I have the following which appera after booting, the top two lines appear as red errors. Sep 25 11:21:07 Tower kernel: atiixp 0000:00:14.1: simplex device: DMA disabled Sep 25 11:21:07 Tower kernel: ide1: DMA disabled Sep 25 11:21:07 Tower kernel: Probing IDE interface ide0... Sep 25 11:21:07 Tower kernel: Probing IDE interface ide1... Sep 25 11:21:07 Tower kernel: ide1: no devices on the port Sep 25 11:21:07 Tower kernel: ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 Sep 25 11:21:07 Tower kernel: ide1 at 0x170-0x177,0x376 on irq 15 Everything seems to be working as it should so should I be concerned?
September 26, 201015 yr In my syslog, I have the following which appera after booting, the top two lines appear as red errors. Sep 25 11:21:07 Tower kernel: atiixp 0000:00:14.1: simplex device: DMA disabled Sep 25 11:21:07 Tower kernel: ide1: DMA disabled Sep 25 11:21:07 Tower kernel: Probing IDE interface ide0... Sep 25 11:21:07 Tower kernel: Probing IDE interface ide1... Sep 25 11:21:07 Tower kernel: ide1: no devices on the port Sep 25 11:21:07 Tower kernel: ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 Sep 25 11:21:07 Tower kernel: ide1 at 0x170-0x177,0x376 on irq 15 Everything seems to be working as it should so should I be concerned? They are "red" because they matched the pattern "DMA diaabled" They are on IDE interface ide1. It apparently has no devices attached. Do you have any IDE devices at all? Are you using IDE interface 1? If not, that is why everything is working as expected. Since you elected to only post a part of your syslog, we have no idea of your disk configuration, but if using SATA drives it probably indicates you have your BIOS configured to emulate an old IDE interface instead of in ACHI mode. If you are using IDE drives, and the interface disabled DMA mode it was usually because the cable used to connect to the drives was not a good quality "flat" 80 conductor IDE cable. (The "round" cables could not handle the data rate and often used PIO mode) Joe L.
September 26, 201015 yr Author Thanks Joe. Most of that went of my (simple) head but no, I don't think I have any IDE devices. The server is built from an PC I had lying around. I stripped out everything which wasn't being used (like the DVD Rom drive) and added 3 brand new SATA drives. So all that's in it is the motherboard which has integrated network, sound and video, a couple of memory modules, a PCI/SATA card and the 3 HDDS. From what you say, I'm thinking that the errors are due to the fact that, when it was a PC, it used to have IDE devices and maybe I should have tweaked something in the BIOS when I stripped it all out. If that's the case, is it safe to ignore. Your patience with an old guy is mutch appreciated.
September 26, 201015 yr Thanks Joe. Most of that went of my (simple) head but no, I don't think I have any IDE devices. The server is built from an PC I had lying around. I stripped out everything which wasn't being used (like the DVD Rom drive) and added 3 brand new SATA drives. So all that's in it is the motherboard which has integrated network, sound and video, a couple of memory modules, a PCI/SATA card and the 3 HDDS. From what you say, I'm thinking that the errors are due to the fact that, when it was a PC, it used to have IDE devices and maybe I should have tweaked something in the BIOS when I stripped it all out. If that's the case, is it safe to ignore. Your patience with an old guy is mutch appreciated. It sounds like everything is as expected. Good luck with your new server. Being an older MB with a PCI bus will make it slower than newer hardware, but many of us use motherboards with a PCI bus. You are not alone. If you expand much beyond the three drives you'll find parity calc speeds slow down as the PCI bus will be the bottleneck. It does not mean it is bad, but you will face longer reconstruction times when you have a disk failure. On my older PCI based server it would probably take 16 to 18 hours to rebuild a drive, and my largest drive on that server is only a 1TB drive (It has 2 SATA drives and 9 IDE drives). On newer PCIe or PCI-X based hardware it would be half that for even a 2TB drive. Joe L.
September 26, 201015 yr Author Ah, fascinating stuff and thanks. You've also helped in another way. As it happens, I was thinking that when I need to add another drive, I really ought to look at doing the job properly. For one thing, I'd have a job physically grafting another HDD into this case, but also I suspect that a new power supply might be in order. Then the processor, being an old P4 has a large and noisy fan. You've convinced me to go whole hog, and start from scratch with all shiny new components. I'll have another good read at the wiki and "best of forums".
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