snap server 4100 jtag/serial port

pierrelux · 06-01-2007, 03:52 PM

I've run into numerous system failures over the last months and started thinking about installation a custom linux distro inside the server. So yesterday, I opened the case and started looking to find something that might look like a serial port that would helps debugging an eventual linux kernel. Then I saw on this forum that snap OS is actually stored in flash. Does anyone have found some jtag points on the board ?

We could make some interesting projects (Apache server, icecast server, radio automation etc.) with another OS, less prone to disk check failures.

blue68f100 · 06-01-2007, 06:55 PM

Whats a jtag ???

Snap used hardware that had extra features that were disabled in BIOS and/or not populated to save cost.

The SnapOS is in Intel Hex Code. If that helps any.

re3dyb0y · 06-02-2007, 03:25 AM

JTAG is Joint Test Action Group

http://en.wikipedia.org/wiki/JTAG

Its a fancy serial port

blue68f100 · 06-02-2007, 06:35 AM

Some of the early boards have the header for a the RS232. Phoenix had one the actually had the com port's db9, if I recall. Most have a ISP port which lookes like a IDE. The v1 2000 had com ports and even a SCSI header that was not populated.

It would be nice to figure out how to put some other OS on these things. The 1100 and 2200 are going to be the easyest to do, since they all ready use a std boot loader. May be easy as connecting a IDE CD rom drive and the HD. But you have to have one that supports teleport since there is no video.

re3dyb0y · 06-02-2007, 08:49 AM

A lot of the linux distro's have SSH installers...

pierrelux · 06-04-2007, 12:23 PM

@blue68f100:
I noticed that there's a flash chip connected close to that connector (the IDE-style connector). What do you mean by ISP port ?

@re3dyb0y
Would be easy, but this makes no sense. Have you ever connected over SSH on your Snap Server ? It seems there's no access to any kind of terminal/console on that board.

blue68f100 · 06-04-2007, 02:30 PM

The flash chip is where the OS is stored.

The ISP port is a special port for testing the MB at the factory and/or trouble shooting a MB problem. This is just my guess. It on most SnapOS MB's.

SSH is used on the guardian units to access the shell.

re3dyb0y · 06-05-2007, 02:36 AM

Quote:

Originally Posted by pierrelux

@re3dyb0y
Would be easy, but this makes no sense. Have you ever connected over SSH on your Snap Server ? It seems there's no access to any kind of terminal/console on that board.

Didnt mean that

If you say attached a cd drive or something to the unit (or put a linux image onto the hard drive) and it booted from it, and it was a network install, it would have to have something such as SSH to connect to it - I know debian did when i put it on my NSLU2

06-01-2007, 03:52 PM	#1
pierrelux Cooling Neophyte Join Date: Jun 2007 Location: Quebec Posts: 2	snap server 4100 jtag/serial port I've run into numerous system failures over the last months and started thinking about installation a custom linux distro inside the server. So yesterday, I opened the case and started looking to find something that might look like a serial port that would helps debugging an eventual linux kernel. Then I saw on this forum that snap OS is actually stored in flash. Does anyone have found some jtag points on the board ? We could make some interesting projects (Apache server, icecast server, radio automation etc.) with another OS, less prone to disk check failures.

06-01-2007, 06:55 PM	#2
blue68f100 Thermophile Join Date: Jul 2005 Location: Plano, TX Posts: 3,135	Re: snap server 4100 jtag/serial port Whats a jtag ??? Snap used hardware that had extra features that were disabled in BIOS and/or not populated to save cost. The SnapOS is in Intel Hex Code. If that helps any. __________________ 1 Snap 4500 - 1.0T (4 x 250gig WD2500SB RE), Raid5, 1 Snap 4500 - 1.6T (4 x 400gig Seagates), Raid5, 1 Snap 4200 - 4.0T (4 x 2gig Seagates), Raid5, Using SATA converts from Andy Link to SnapOS FAQ's http://forums.procooling.com/vbb/showthread.php?t=13820

06-02-2007, 03:25 AM	#3
re3dyb0y Cooling Savant Join Date: Aug 2004 Location: UK Posts: 909	Re: snap server 4100 jtag/serial port JTAG is Joint Test Action Group http://en.wikipedia.org/wiki/JTAG Its a fancy serial port __________________ Snap Server Help Wiki - http://wiki.procooling.com/index.php/Snap_Server Snap Server 2200 v3.4.807 2x 250GB Seagate Barracuda 7200.9 w/ UNIDFC601512M Replacement Fan "Did you really think it would be that easy??" Other NAS's 1x NSLU2 w/ 512mb Corsair Flash Voyager Running Unslung 6.8b 1x NSLU2 w/ 8Gb LaCie Carte Orange Running Debian/NSLU2 Stable 4.0r0 250GB LaCie Ethernet Disk Running Windows XP Embedded

06-02-2007, 06:35 AM	#4
blue68f100 Thermophile Join Date: Jul 2005 Location: Plano, TX Posts: 3,135	Re: snap server 4100 jtag/serial port Some of the early boards have the header for a the RS232. Phoenix had one the actually had the com port's db9, if I recall. Most have a ISP port which lookes like a IDE. The v1 2000 had com ports and even a SCSI header that was not populated. It would be nice to figure out how to put some other OS on these things. The 1100 and 2200 are going to be the easyest to do, since they all ready use a std boot loader. May be easy as connecting a IDE CD rom drive and the HD. But you have to have one that supports teleport since there is no video. __________________ 1 Snap 4500 - 1.0T (4 x 250gig WD2500SB RE), Raid5, 1 Snap 4500 - 1.6T (4 x 400gig Seagates), Raid5, 1 Snap 4200 - 4.0T (4 x 2gig Seagates), Raid5, Using SATA converts from Andy Link to SnapOS FAQ's http://forums.procooling.com/vbb/showthread.php?t=13820

06-02-2007, 08:49 AM	#5
re3dyb0y Cooling Savant Join Date: Aug 2004 Location: UK Posts: 909	Re: snap server 4100 jtag/serial port A lot of the linux distro's have SSH installers... __________________ Snap Server Help Wiki - http://wiki.procooling.com/index.php/Snap_Server Snap Server 2200 v3.4.807 2x 250GB Seagate Barracuda 7200.9 w/ UNIDFC601512M Replacement Fan "Did you really think it would be that easy??" Other NAS's 1x NSLU2 w/ 512mb Corsair Flash Voyager Running Unslung 6.8b 1x NSLU2 w/ 8Gb LaCie Carte Orange Running Debian/NSLU2 Stable 4.0r0 250GB LaCie Ethernet Disk Running Windows XP Embedded

06-04-2007, 12:23 PM	#6
pierrelux Cooling Neophyte Join Date: Jun 2007 Location: Quebec Posts: 2	Re: snap server 4100 jtag/serial port @blue68f100: I noticed that there's a flash chip connected close to that connector (the IDE-style connector). What do you mean by ISP port ? @re3dyb0y Would be easy, but this makes no sense. Have you ever connected over SSH on your Snap Server ? It seems there's no access to any kind of terminal/console on that board.

06-04-2007, 02:30 PM	#7
blue68f100 Thermophile Join Date: Jul 2005 Location: Plano, TX Posts: 3,135	Re: snap server 4100 jtag/serial port The flash chip is where the OS is stored. The ISP port is a special port for testing the MB at the factory and/or trouble shooting a MB problem. This is just my guess. It on most SnapOS MB's. SSH is used on the guardian units to access the shell. __________________ 1 Snap 4500 - 1.0T (4 x 250gig WD2500SB RE), Raid5, 1 Snap 4500 - 1.6T (4 x 400gig Seagates), Raid5, 1 Snap 4200 - 4.0T (4 x 2gig Seagates), Raid5, Using SATA converts from Andy Link to SnapOS FAQ's http://forums.procooling.com/vbb/showthread.php?t=13820

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