Seagate ST340824A and (un)clipping max LBA: 2.2.19+ide04092001 patch

[Alexander Stavitsky]

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Disk capacity unclipping routines in ide.2.2.19.04092001.patch do not unclip
Seagate ST340824A.

I have to use the jumper on the drive to make system boot.
I tried "setmax" program and it is able to unclip the capacity,
kernel however does not.

I digged a little and I think the problem is that ST340824A does not follow
the ATA standard - it does support both READ NATIVE MAX ADDRESS
and SET MAX ADDRESS, but does not advertise support for
Host Protected Area feature set.

drive->id->command_set_1 =3D 0x306b for the this drive.

The unclipping routines compare
drive->id->command_set_1 and 0x0400 (Host Protected Feature set)
The earlier version of the patch compared
drive->id->command_set_1 and 0x000a (Security Mode & Power Managment ???)

When I changed it back to 0x000a, it unclipped the capacity just fine.
But 0x000a doesn't make any sense to me.
What is the correct solution?

Also the idedisk_supports_host_protected_area is there, but not used and
the printk's notifying of unclipping are commented out???

I attach the diff to show what I'm talking about.

Also a related question: when I use "setmax", the drive reports full
capacity through "hdparm -I /dev/hd*", but kernel still uses the old info.
How does one update the kernel info after using "setmax"?

--- ide-disk.c.orig	Mon Apr 16 13:30:50 2001
+++ ide-disk.c	Fri Apr 27 11:16:38 2001
@@ -546,7 +546,7 @@
 	ide_task_t args;
 	unsigned long addr =3D 0;
=20
-	if (!(drive->id->command_set_1 & 0x0400))
+	if (!(drive->id->command_set_1 & 0x000a))
 //	if (!(drive->id->cfs_enable_1 & 0x0400))
 		return addr;
=20
@@ -580,7 +580,7 @@
 	ide_task_t args;
 	unsigned long addr_set =3D 0;
 =09
-//	printk("%s: (un)clipping max LBA...%lu\n", drive->name, addr_req);
+	printk("%s: (un)clipping max LBA...%lu\n", drive->name, addr_req);
=20
 	addr_req--;
 	/* Create IDE/ATA command request structure */
@@ -603,7 +603,7 @@
 			 | ((args.tfRegister[IDE_SECTOR_OFFSET]       ));
 	}
 	addr_set++;
-//	printk("%s: max LBA (un)clipped to %lu\n", drive->name, addr_set);
+	printk("%s: max LBA (un)clipped to %lu\n", drive->name, addr_set);
 	return addr_set;
 }
=20

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