KarlMW
Group: Members
Posts: 6
Joined: Sep. 2007 |
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Posted: Sep. 27 2007,03:35 |
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| Quote (^thehatsrule^ @ Sep. 27 2007,03:24) | | Quote | | Standard DSL boot includes probing for a AHA1542 SCSI interface. On the T20, when it tries to probe this module (looking for something to boot from), it freezes for just over a minute, before continuing normally. This can be fixed by modifying the DSL boot script (linuxrc). |
If you have no use for scsi at all, you can easily pass the "noscsi" cheatcode in your bootloader. |
Unfortunately, that also prevents USB boot, since linux sees USB as being SCSI. I need to look at my script for unpacking/editing initrd/linuxrc again, to make it easy to do these tweaks. I have edited the linuxrc before, but I want a cleaner way to do it, rather than manual unpacking/repacking.
| Quote | | Quote | | I don't know how to access the internal flash after boot. There's something weird about it. This is not a problem though - grub can find the files and load them, and from then on we are relying on the external flashdrive. Later on I will document how to pack DSL into the initrd, so it can boot without any external flash (but that hasn't been done yet, as at 5 May 2007) |
Try `fdisk -l`? You may be interested in the dsl-initrd version. |
fdisk and blkid and /proc/partitions all show only my usb boot drive - they don't make any mention of the internal flash 'drive'
It seems that the 'IDE' controller is not fully setup - it appears not to have been assigned an interrupt, for a start. Using lspci -vv shows this for the IDE interface:
0000:00:12.2 IDE interface: Cyrix Corporation 5530 IDE [Kahlua] (prog-if 80 [Master])
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Region 4: I/O ports at fb00 [size=128]
Compared with this on one of my conventional linux boxes:
00:1f.1 IDE interface: Intel Corporation 82801DB (ICH4) IDE Controller (rev 01) (prog-if 8a [Master SecP PriP])
Subsystem: Dell Optiplex GX260
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin A routed to IRQ 18
Region 0: I/O ports at 01f0 [size=8]
Region 1: I/O ports at 03f4 [size=1]
Region 2: I/O ports at 0170 [size=8]
Region 3: I/O ports at 0374 [size=1]
Region 4: I/O ports at ffa0 [size=16]
Region 5: Memory at 40000000 (32-bit, non-prefetchable) [size=1K]
Note the lack of an interrupt assignment on the first listing, and possibly a lack of memory assignment too (I can't say I know how to interpret the listing fully). I am led to believe that MTD drivers may be able to access the internal flash, but I've not investigated it myself.
I have run DSL entirely from initrd before, and it is useful for some tasks. Unfortunately, without being able to read/write the internal flash, there is nowhere to store non-volatile runtime data, and a USB flash drive ends up being necessary for most things anyway. So, one may as well boot off the flash drive too :-)
| Quote | | EDIT: looks like you did find out about some of this already, guess just some things weren't updated |
I'm finding that even with a teensy little site such as mine, keeping everything up to date and consistent can take quite a lot of effort!
Thanks for your comments - I have made changes to my site, and made a note that I really should re-read all that I've written there and check that it still makes sense :-)
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