diff --git a/kernel/trunk/fs/fat32.inc b/kernel/trunk/fs/fat32.inc
index 7e6a908f76..b3d078bb50 100644
--- a/kernel/trunk/fs/fat32.inc
+++ b/kernel/trunk/fs/fat32.inc
@@ -129,8 +129,41 @@ reserve_hd1:
     pop   eax
     sti
     ret
-
-
+;********************************************
+reserve_hd_channel:
+    cmp   [hdbase], 0x1F0
+    jne   .IDE_Channel_2
+.IDE_Channel_1:
+    cli
+    cmp   [IDE_Channel_1],0
+    je    .reserve_ok_1
+    sti
+    call  change_task
+    jmp   .IDE_Channel_1
+.IDE_Channel_2:
+    cli
+    cmp   [IDE_Channel_2],0
+    je    .reserve_ok_2
+    sti
+    call  change_task
+    jmp   .IDE_Channel_1
+.reserve_ok_1:
+    mov [IDE_Channel_1],1
+    ret
+.reserve_ok_2:
+    mov [IDE_Channel_2],1
+    ret
+    
+free_hd_channel:
+    cmp   [hdbase], 0x1F0
+    jne   .IDE_Channel_2
+.IDE_Channel_1:
+    mov [IDE_Channel_1],0
+    ret
+.IDE_Channel_2:
+    mov [IDE_Channel_2],0
+    ret
+;********************************************
 clear_hd_cache:
 
     push  eax ecx edi
diff --git a/kernel/trunk/fs/fs_lfn.inc b/kernel/trunk/fs/fs_lfn.inc
index 6aa7e240e0..8bdae2f0d9 100644
--- a/kernel/trunk/fs/fs_lfn.inc
+++ b/kernel/trunk/fs/fs_lfn.inc
@@ -407,6 +407,7 @@ fs_OnHd3:
         mov     [hdid], 0x10
         push    4
 fs_OnHd:
+        call    reserve_hd_channel
         pop     eax
         mov     [hdpos], eax
         cmp     ecx, 0x100
@@ -414,6 +415,7 @@ fs_OnHd:
         cmp     cl, [0x40001+eax]
         jbe     @f
 .nf:
+        call    free_hd_channel
         and     [hd1_status], 0
         mov     dword [esp+36], 5       ; not found
         ret
@@ -430,11 +432,13 @@ fs_OnHd:
         jae     .not_impl
         add     ebx, 4
         call    dword [fs_HdServices + eax*4]
+        call    free_hd_channel
         and     [hd1_status], 0
         mov     [esp+36], eax
         mov     [esp+24], ebx
         ret
 .not_impl:
+        call    free_hd_channel
         and     [hd1_status], 0
         mov     dword [esp+36], 2       ; not implemented
         ret
@@ -475,7 +479,7 @@ fs_OnCd3:
         mov  [DiskNumber],1
         push    0
 fs_OnCd:
-
+        call    reserve_cd_channel
         pop     eax
         mov     [hdpos], eax
         cmp     ecx, 0x100
@@ -489,6 +493,7 @@ fs_OnCd:
 
         jnz     @f
 .nf:
+        call    free_cd_channel
         and    [cd_status], 0
         mov     dword [esp+36], 5       ; not found
         ret
@@ -501,11 +506,13 @@ fs_OnCd:
         jae      .not_impl
         add     ebx, 4
         call    dword [fs_CdServices + eax*4]
+        call    free_cd_channel
         and     [cd_status], 0
         mov     [esp+36], eax
         mov     [esp+24], ebx
         ret
 .not_impl:
+        call    free_cd_channel
         and     [cd_status], 0
         mov     dword [esp+36], 2       ; not implemented
         ret
diff --git a/kernel/trunk/fs/iso9660.inc b/kernel/trunk/fs/iso9660.inc
index 40d7082b84..72cd5bff89 100644
--- a/kernel/trunk/fs/iso9660.inc
+++ b/kernel/trunk/fs/iso9660.inc
@@ -4,6 +4,8 @@ cd_current_pointer_of_input    dd  0
 cd_current_pointer_of_input_2  dd  0
 cd_mem_location                dd  0
 cd_counter_block               dd  0
+IDE_Channel_1                  db  0
+IDE_Channel_2                  db  0
 endg
 
 CDDataBuf equ 0x7000
@@ -16,7 +18,7 @@ reserve_cd:
 
     sti
     call  change_task
-    jmp   reserve_hd1
+    jmp   reserve_cd
 
   reserve_ok2:
 
@@ -28,6 +30,40 @@ reserve_cd:
     pop   eax
     sti
     ret
+
+reserve_cd_channel:
+    cmp   [ChannelNumber],1
+    jne   .IDE_Channel_2
+.IDE_Channel_1:
+    cli
+    cmp   [IDE_Channel_1],0
+    je    .reserve_ok_1
+    sti
+    call  change_task
+    jmp   .IDE_Channel_1
+.IDE_Channel_2:
+    cli
+    cmp   [IDE_Channel_2],0
+    je    .reserve_ok_2
+    sti
+    call  change_task
+    jmp   .IDE_Channel_1
+.reserve_ok_1:
+    mov [IDE_Channel_1],1
+    ret
+.reserve_ok_2:
+    mov [IDE_Channel_2],1
+    ret
+
+free_cd_channel:
+    cmp   [ChannelNumber],1
+    jne   .IDE_Channel_2
+.IDE_Channel_1:
+    mov [IDE_Channel_1],0  
+    ret
+.IDE_Channel_2:
+    mov [IDE_Channel_2],0
+    ret
     
 cd_status dd 0