Solaris and controller

zillah · 11-28-2005, 02:51 PM

http://www.devhood.com/tutorials/tut...utorial_id=514

"c# -- "controller" number; in our case, primary (0) or secondary (1) "

Is a controller same as IDE on motherboard ?

See this:

http://forum.sun.com/thread.jspa?thr...essageID=63567

(( c0d0 is the boot disk, master device on the primary ide channel.
c1d0 is another IDE disk, master device on the secondary ide channel.

jlliagre · 11-29-2005, 08:12 AM

Quote:

Is a controller same as IDE on motherboard ?

No but the reverse is true, an IDE plug on your motherboard correspond to a controller in this terminology.

zillah · 11-29-2005, 08:37 AM

Quote:

an IDE plug on your motherboard correspond to a controller in this terminology.

You meant this IDE here
" Figure 7. Bed of nails connectors on the motherboard with Primary and Secondary IDE clearly marked."

http://www.melbpc.org.au/pcupdate/2203/2203article3.htm

And

http://www.quepublishing.com/article...&seqNum=4&rl=1

"Figure 3.13 An ATA/IDE motherboard-based host adapter (top) compared to a pair of SATA host adapters (bottom)".

Quote:

correspond to a controller in this terminology.

Which controller ? Solaris ? where is that one ? Is it logical ? or physical on motherboard but solaris named it controller

jlliagre · 11-29-2005, 02:32 PM

A physical IDE mainboard connector correspond to an IDE controller (a.k.a. host adapter in the pages you link).
Each controller can receive two disks, a master and a slave.

zillah · 11-30-2005, 01:36 AM

In my SunFire v20Z I have two SCSI disks,,,,the partitioning always shows me c1t1d0

c1: refere to IDE1 (Secondary IDE)

t1: does it refer to SCSI HD slave ? ( I am assuming 0 for primary SCSI and 1 for secondary SCSI)

d0: does it refer to partition number ? or disk number ?

Bear in mind that we have letter "P" refer to partition as well.

jlliagre · 11-30-2005, 03:13 AM

Your are confusing SCSI and IDE which are different technologies.

There is no such thing as slave SCSI, SCSI can have multiple targets (0 to 7), one of them being the controller itself (usually 7).
t1 means target 1 (you usually can change it on the device with jumpers or equivalent)
d0 means disk number (logical unit) on that target, ususally 0, but may be different on juke-box like devices.

zillah · 12-01-2005, 01:25 AM

Quote:

SCSI can have multiple targets (0 to 7 for old H/W, 0 to 15 for newer), one of them being the controller itself.

What does target mean ?

I know "t":"target" SCSI id number; we omit this field for ATAPI devices.

jlliagre · 12-01-2005, 01:51 AM

You are (correctly) answering your own question.
Anything still unclear for you ?

zillah · 12-01-2005, 03:14 AM

Quote:

Anything still unclear for you ?

Suppose my computer have two SCSI cards (SCSIa, SCSIb) and two SCSI HDs (A and B).

1- SCSI A HD is on SCSIa card.

2- SCSI B HD is on SCSIb card.

How does solaris name these HDs ?

jlliagre · 12-01-2005, 01:05 PM

c<a1>t<a2>d0p0
and
c<b1>t<b2>d0p0

with a1/b1 being the controller ids, presumabily 0 and 1, and a2/b2 being anything that is set on the drive.

By the way, these names are just symlinks, the real names are something "much prettier", like:
/devices/pci@0,0/pci1462,7141@13,2/storage@7/disk@0,1

zillah · 12-01-2005, 01:12 PM

Thanks jilliage.
Could you please refer me to some sites have got good explaination,about SCSI and name convention with details; because I have got heaps of collection about SCSI HD name and partition ; with out any good exlpaination.

jlliagre · 12-01-2005, 01:56 PM

http://docs.sun.com/app/docs/doc/819...0t0d0s0&a=view

zillah · 12-02-2005, 11:16 AM

If I have got PCI slot, and I connected to that PCI slot, SCSI conteroller card ( i.e SCSI controller card uses a PCI slot ,and this SCSI card can link 15 devices ).

1- What is the name convention (not number) of PCI slot under solaris ?

2- What is the name of the connector (we have 15 connectors) on the SCSI controller crad under solaris ?

jlliagre · 12-02-2005, 11:49 AM

1: prtconf will probably give clues about the mapping between PCI slots and devices.
2: If you really have 15 connectors (which seems and odd number to me), then they will likely be named cn to cn+14, with n depending on the other disk controllers present on your machine.