from in -ac/redhat.

diff -urN 28rc1/drivers/scsi/ide-scsi.c 28rc1_aac/drivers/scsi/ide-scsi.c
--- 28rc1/drivers/scsi/ide-scsi.c	2003-11-28 20:26:20.000000000 +0200
+++ 28rc1_aac/drivers/scsi/ide-scsi.c	2004-10-24 00:58:11.000000000 +0300
@@ -1,5 +1,5 @@
 /*
- * linux/drivers/scsi/ide-scsi.c	Version 0.93    June 10, 2002
+ * linux/drivers/scsi/ide-scsi.c	Version 0.94    Sept 09, 2003
  *
  * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il>
  * Copyright (C) 2001 - 2002 Andre Hedrick <andre@linux-ide.org>
@@ -35,9 +35,12 @@
  * Ver 0.92  Mar 21 02   Include DevFs support
  *                        Borsenkow Andrej <Andrej.Borsenkow@mow.siemens.ru>
  * Ver 0.93  Jun 10 02   Fix "off by one" error in transforms
+ * Ver 0.94  Sep 09 03   Added transform for reading ATAPI tape drive block
+ *                        limits (ATAPI tapes report block limits in mode
+ *                        page 0x2A, not by "read block limits" command)
  */
 
-#define IDESCSI_VERSION "0.93"
+#define IDESCSI_VERSION "0.94"
 
 #include <linux/module.h>
 #include <linux/config.h>
@@ -234,6 +237,25 @@
 			pc->buffer_size += 4;
 		}
 	}
+	if (drive->media == ide_tape) {
+		if (sc[0] == READ_BLOCK_LIMITS) {	/* IDE tapes have blk lmts in mode page 0x2a */
+			if (!scsi_buf)
+				return;
+			/* buffer size should be 6 for READ_BLOCK_LIMITS    */
+			/* we need 12 bytes (4 for header + 8 for mode page */
+			if ((atapi_buf = kmalloc(12, GFP_ATOMIC)) == NULL)
+				return;
+			memset(atapi_buf, 0, 12);
+			memset (c, 0, 12);
+			c[0] = MODE_SENSE;
+			c[1] = 8;  	/* no block descriptors     */
+			c[2] = 0x2A;	/* mode page 0x2A           */
+			c[4] = 12;	/* buffer length 12 decimal */
+			pc->buffer = atapi_buf;
+			pc->request_transfer = 12;
+			pc->buffer_size = 12;
+		}
+	}
 }
 
 static inline void idescsi_transform_pc2 (ide_drive_t *drive, idescsi_pc_t *pc)
@@ -262,7 +284,19 @@
 			/* response data format */
 			scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2;
 		}
+	}	
+	if (drive->media == ide_tape) {
+		if (sc[0] == READ_BLOCK_LIMITS) {
+			memset(scsi_buf, 0, pc->scsi_cmd->request_bufflen);
+			/* granularity of 9 (always 9 for ide tapes) */
+			scsi_buf[0] = 9;
+			/* block length of 1024 bytes supported? */
+			scsi_buf[2] = (atapi_buf[11] & 0x04) ? 4 : 2;
+			/* block length of 512 bytes supported?  */
+			scsi_buf[4] = (atapi_buf[11] & 0x02) ? 2 : 4;
+		}
 	}
+
 	if (atapi_buf && atapi_buf != scsi_buf)
 		kfree(atapi_buf);
 }