Bug 458796

Summary: warning about duplicates when doing scsi-add-single-device for already present device
Product: [Fedora] Fedora Reporter: Patrick C. F. Ernzer <pcfe>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 9CC: aaro.koskinen, sprabhu
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2009-06-16 16:17:16 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Patrick C. F. Ernzer 2008-08-12 11:29:40 UTC
Description of problem:
warning when doing
  echo "scsi add-single-device 0 0 0 0">/proc/scsi/scsi
with device already present


Version-Release number of selected component (if applicable):
2.6.25.11-97.fc9

How reproducible:
always

Steps to Reproduce:
1. boot machine
2. verify 0 0 0 0 is present
3. echo "scsi add-single-device 0 0 0 0">/proc/scsi/scsi
  
Actual results:
[root@machine059 aakoskin]# dmesg
sysfs: duplicate filename 'period' can not be created
------------[ cut here ]------------
WARNING: at fs/sysfs/dir.c:424 sysfs_add_one+0x34/0xa6() (Not tainted)
Modules linked in: bridge bnep rfcomm l2cap bluetooth sunrpc ipv6 loop 
dm_multip
ath e1000 sg pata_acpi ata_piix button ata_generic e7xxx_edac iTCO_wdt 
i2c_i801
iTCO_vendor_support libata edac_core i2c_core pcspkr joydev dm_snapshot 
dm_zero
dm_mirror dm_mod sym53c8xx scsi_transport_spi sd_mod scsi_mod ext3 jbd 
mbcache u
hci_hcd ohci_hcd ehci_hcd [last unloaded: microcode]
Pid: 1772, comm: bash Not tainted 2.6.25.11-97.fc9.i686 #1
  [<c0426bc5>] warn_on_slowpath+0x47/0x73
  [<c042b0c0>] ? irq_exit+0x53/0x6b
  [<c04145ad>] ? smp_apic_timer_interrupt+0x6e/0x7c
  [<c0406694>] ? apic_timer_interrupt+0x28/0x30
  [<c042756a>] ? vprintk+0x2fb/0x330
  [<c04effe7>] ? ida_get_new_above+0xd0/0x171
  [<c049283d>] ? find_inode+0x1f/0x5b
  [<c04bb62c>] ? sysfs_ilookup_test+0x0/0x11
  [<c049294e>] ? ifind+0x32/0x87
  [<c04bb90e>] sysfs_add_one+0x34/0xa6
  [<c04bb4f2>] sysfs_add_file+0x45/0x6d
  [<c04bb565>] sysfs_add_file_to_group+0x4b/0x6c
  [<f885f77e>] spi_target_configure+0x3e/0x6a [scsi_transport_spi]
  [<f885f740>] ? spi_target_configure+0x0/0x6a [scsi_transport_spi]
  [<c05648d5>] transport_configure+0x18/0x1e
  [<c0564608>] attribute_container_device_trigger+0x5a/0x8e
  [<c05648bd>] ? transport_configure+0x0/0x1e
  [<c0564921>] transport_configure_device+0xd/0xf
  [<f8b24716>] __scsi_scan_target+0x554/0x56b [scsi_mod]
  [<f8b24789>] scsi_scan_channel+0x5c/0x66 [scsi_mod]
  [<f8b2486e>] scsi_scan_host_selected+0xdb/0xf6 [scsi_mod]
  [<f8b264a1>] proc_scsi_write+0x125/0x1f8 [scsi_mod]
  [<f8b2637c>] ? proc_scsi_write+0x0/0x1f8 [scsi_mod]
  [<c04b13b7>] proc_reg_write+0x5a/0x6e
  [<c04b135d>] ? proc_reg_write+0x0/0x6e
  [<c048272f>] vfs_write+0x8a/0x12e
  [<c048286c>] sys_write+0x3b/0x60
  [<c0405bf2>] syscall_call+0x7/0xb
  =======================
---[ end trace 18f117abcda53ae3 ]---
sysfs: duplicate filename 'min_period' can not be created
------------[ cut here ]------------
WARNING: at fs/sysfs/dir.c:424 sysfs_add_one+0x34/0xa6() (Not tainted)
Modules linked in: bridge bnep rfcomm l2cap bluetooth sunrpc ipv6 loop 
dm_multipath e1000 sg pata_acpi ata_piix button ata_generic e7xxx_edac 
iTCO_wdt i2c_i801 iTCO_vendor_support libata edac_core i2c_core pcspkr 
joydev dm_snapshot dm_zero dm_mirror dm_mod sym53c8xx scsi_transport_spi 
sd_mod scsi_mod ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd [last 
unloaded: microcode]
Pid: 1772, comm: bash Not tainted 2.6.25.11-97.fc9.i686 #1
  [<c0426bc5>] warn_on_slowpath+0x47/0x73
  [<c043a800>] ? hrtimer_start+0xca/0x141
  [<c04f3fa4>] ? vsnprintf+0x287/0x420
  [<c041c1af>] ? __wake_up_locked+0x11/0x15
  [<c061c1ae>] ? __down_trylock+0x3e/0x48
  [<c062ad0a>] ? __down_failed_trylock+0xa/0x10
  [<c04effe7>] ? ida_get_new_above+0xd0/0x171
  [<c049283d>] ? find_inode+0x1f/0x5b
  [<c04bb62c>] ? sysfs_ilookup_test+0x0/0x11
  [<c049294e>] ? ifind+0x32/0x87
  [<c04bb90e>] sysfs_add_one+0x34/0xa6
  [<c04bb4f2>] sysfs_add_file+0x45/0x6d
  [<c04bb565>] sysfs_add_file_to_group+0x4b/0x6c
  [<f885f77e>] spi_target_configure+0x3e/0x6a [scsi_transport_spi]
  [<f885f740>] ? spi_target_configure+0x0/0x6a [scsi_transport_spi]
  [<c05648d5>] transport_configure+0x18/0x1e
  [<c0564608>] attribute_container_device_trigger+0x5a/0x8e
  [<c05648bd>] ? transport_configure+0x0/0x1e
  [<c0564921>] transport_configure_device+0xd/0xf
  [<f8b24716>] __scsi_scan_target+0x554/0x56b [scsi_mod]
  [<f8b24789>] scsi_scan_channel+0x5c/0x66 [scsi_mod]
  [<f8b2486e>] scsi_scan_host_selected+0xdb/0xf6 [scsi_mod]
  [<f8b264a1>] proc_scsi_write+0x125/0x1f8 [scsi_mod]
  [<f8b2637c>] ? proc_scsi_write+0x0/0x1f8 [scsi_mod]
  [<c04b13b7>] proc_reg_write+0x5a/0x6e
  [<c04b135d>] ? proc_reg_write+0x0/0x6e
  [<c048272f>] vfs_write+0x8a/0x12e
  [<c048286c>] sys_write+0x3b/0x60
  [<c0405bf2>] syscall_call+0x7/0xb
  =======================
---[ end trace 18f117abcda53ae3 ]---
sysfs: duplicate filename 'offset' can not be created
------------[ cut here ]------------
WARNING: at fs/sysfs/dir.c:424 sysfs_add_one+0x34/0xa6() (Not tainted)
Modules linked in: bridge bnep rfcomm l2cap bluetooth sunrpc ipv6 loop 
dm_multipath e1000 sg pata_acpi ata_piix button ata_generic e7xxx_edac 
iTCO_wdt i2c_i801 iTCO_vendor_support libata edac_core i2c_core pcspkr 
joydev dm_snapshot dm_zero dm_mirror dm_mod sym53c8xx scsi_transport_spi 
sd_mod scsi_mod ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd [last 
unloaded: microcode]
Pid: 1772, comm: bash Not tainted 2.6.25.11-97.fc9.i686 #1
  [<c0426bc5>] warn_on_slowpath+0x47/0x73
  [<c043a800>] ? hrtimer_start+0xca/0x141
  [<c04f3fa4>] ? vsnprintf+0x287/0x420
  [<c041c1af>] ? __wake_up_locked+0x11/0x15
  [<c061c1ae>] ? __down_trylock+0x3e/0x48
  [<c062ad0a>] ? __down_failed_trylock+0xa/0x10
  [<c04effe7>] ? ida_get_new_above+0xd0/0x171
  [<c049283d>] ? find_inode+0x1f/0x5b
  [<c04bb62c>] ? sysfs_ilookup_test+0x0/0x11
  [<c049294e>] ? ifind+0x32/0x87
  [<c04bb90e>] sysfs_add_one+0x34/0xa6
  [<c04bb4f2>] sysfs_add_file+0x45/0x6d
  [<c04bb565>] sysfs_add_file_to_group+0x4b/0x6c
  [<f885f77e>] spi_target_configure+0x3e/0x6a [scsi_transport_spi]
  [<f885f740>] ? spi_target_configure+0x0/0x6a [scsi_transport_spi]
  [<c05648d5>] transport_configure+0x18/0x1e
  [<c0564608>] attribute_container_device_trigger+0x5a/0x8e
  [<c05648bd>] ? transport_configure+0x0/0x1e
  [<c0564921>] transport_configure_device+0xd/0xf
  [<f8b24716>] __scsi_scan_target+0x554/0x56b [scsi_mod]
  [<f8b24789>] scsi_scan_channel+0x5c/0x66 [scsi_mod]
  [<f8b2486e>] scsi_scan_host_selected+0xdb/0xf6 [scsi_mod]
  [<f8b264a1>] proc_scsi_write+0x125/0x1f8 [scsi_mod]
  [<f8b2637c>] ? proc_scsi_write+0x0/0x1f8 [scsi_mod]
  [<c04b13b7>] proc_reg_write+0x5a/0x6e
  [<c04b135d>] ? proc_reg_write+0x0/0x6e
  [<c048272f>] vfs_write+0x8a/0x12e
  [<c048286c>] sys_write+0x3b/0x60
  [<c0405bf2>] syscall_call+0x7/0xb
  =======================
---[ end trace 18f117abcda53ae3 ]---
sysfs: duplicate filename 'max_offset' can not be created
------------[ cut here ]------------
WARNING: at fs/sysfs/dir.c:424 sysfs_add_one+0x34/0xa6() (Not tainted)
Modules linked in: bridge bnep rfcomm l2cap bluetooth sunrpc ipv6 loop 
dm_multipath e1000 sg pata_acpi ata_piix button ata_generic e7xxx_edac 
iTCO_wdt i2c_i801 iTCO_vendor_support libata edac_core i2c_core pcspkr 
joydev dm_snapshot dm_zero dm_mirror dm_mod sym53c8xx scsi_transport_spi 
sd_mod scsi_mod ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd [last 
unloaded: microcode]
Pid: 1772, comm: bash Not tainted 2.6.25.11-97.fc9.i686 #1
  [<c0426bc5>] warn_on_slowpath+0x47/0x73
  [<c043a800>] ? hrtimer_start+0xca/0x141
  [<c04f3fa4>] ? vsnprintf+0x287/0x420
  [<c041c1af>] ? __wake_up_locked+0x11/0x15
  [<c061c1ae>] ? __down_trylock+0x3e/0x48
  [<c062ad0a>] ? __down_failed_trylock+0xa/0x10
  [<c04effe7>] ? ida_get_new_above+0xd0/0x171
  [<c049283d>] ? find_inode+0x1f/0x5b
  [<c04bb62c>] ? sysfs_ilookup_test+0x0/0x11
  [<c049294e>] ? ifind+0x32/0x87
  [<c04bb90e>] sysfs_add_one+0x34/0xa6
  [<c04bb4f2>] sysfs_add_file+0x45/0x6d
  [<c04bb565>] sysfs_add_file_to_group+0x4b/0x6c
  [<f885f77e>] spi_target_configure+0x3e/0x6a [scsi_transport_spi]
  [<f885f740>] ? spi_target_configure+0x0/0x6a [scsi_transport_spi]
  [<c05648d5>] transport_configure+0x18/0x1e
  [<c0564608>] attribute_container_device_trigger+0x5a/0x8e
  [<c05648bd>] ? transport_configure+0x0/0x1e
  [<c0564921>] transport_configure_device+0xd/0xf
  [<f8b24716>] __scsi_scan_target+0x554/0x56b [scsi_mod]
  [<f8b24789>] scsi_scan_channel+0x5c/0x66 [scsi_mod]
  [<f8b2486e>] scsi_scan_host_selected+0xdb/0xf6 [scsi_mod]
  [<f8b264a1>] proc_scsi_write+0x125/0x1f8 [scsi_mod]
  [<f8b2637c>] ? proc_scsi_write+0x0/0x1f8 [scsi_mod]
  [<c04b13b7>] proc_reg_write+0x5a/0x6e
  [<c04b135d>] ? proc_reg_write+0x0/0x6e
  [<c048272f>] vfs_write+0x8a/0x12e
  [<c048286c>] sys_write+0x3b/0x60
  [<c0405bf2>] syscall_call+0x7/0xb
  =======================
---[ end trace 18f117abcda53ae3 ]---
sysfs: duplicate filename 'width' can not be created
------------[ cut here ]------------
WARNING: at fs/sysfs/dir.c:424 sysfs_add_one+0x34/0xa6() (Not tainted)
Modules linked in: bridge bnep rfcomm l2cap bluetooth sunrpc ipv6 loop 
dm_multipath e1000 sg pata_acpi ata_piix button ata_generic e7xxx_edac 
iTCO_wdt i2c_i801 iTCO_vendor_support libata edac_core i2c_core pcspkr 
joydev dm_snapshot dm_zero dm_mirror dm_mod sym53c8xx scsi_transport_spi 
sd_mod scsi_mod ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd [last 
unloaded: microcode]
Pid: 1772, comm: bash Not tainted 2.6.25.11-97.fc9.i686 #1
  [<c0426bc5>] warn_on_slowpath+0x47/0x73
  [<c043a800>] ? hrtimer_start+0xca/0x141
  [<c04f3fa4>] ? vsnprintf+0x287/0x420
  [<c041c1af>] ? __wake_up_locked+0x11/0x15
  [<c061c1ae>] ? __down_trylock+0x3e/0x48
  [<c062ad0a>] ? __down_failed_trylock+0xa/0x10
  [<c04effe7>] ? ida_get_new_above+0xd0/0x171
  [<c049283d>] ? find_inode+0x1f/0x5b
  [<c04bb62c>] ? sysfs_ilookup_test+0x0/0x11
  [<c049294e>] ? ifind+0x32/0x87
  [<c04bb90e>] sysfs_add_one+0x34/0xa6
  [<c04bb4f2>] sysfs_add_file+0x45/0x6d
  [<c04bb565>] sysfs_add_file_to_group+0x4b/0x6c
  [<f885f77e>] spi_target_configure+0x3e/0x6a [scsi_transport_spi]
  [<f885f740>] ? spi_target_configure+0x0/0x6a [scsi_transport_spi]
  [<c05648d5>] transport_configure+0x18/0x1e
  [<c0564608>] attribute_container_device_trigger+0x5a/0x8e
  [<c05648bd>] ? transport_configure+0x0/0x1e
  [<c0564921>] transport_configure_device+0xd/0xf
  [<f8b24716>] __scsi_scan_target+0x554/0x56b [scsi_mod]
  [<f8b24789>] scsi_scan_channel+0x5c/0x66 [scsi_mod]
  [<f8b2486e>] scsi_scan_host_selected+0xdb/0xf6 [scsi_mod]
  [<f8b264a1>] proc_scsi_write+0x125/0x1f8 [scsi_mod]
  [<f8b2637c>] ? proc_scsi_write+0x0/0x1f8 [scsi_mod]
  [<c04b13b7>] proc_reg_write+0x5a/0x6e
  [<c04b135d>] ? proc_reg_write+0x0/0x6e
  [<c048272f>] vfs_write+0x8a/0x12e
  [<c048286c>] sys_write+0x3b/0x60
  [<c0405bf2>] syscall_call+0x7/0xb
  =======================
---[ end trace 18f117abcda53ae3 ]---
sysfs: duplicate filename 'max_width' can not be created
------------[ cut here ]------------
WARNING: at fs/sysfs/dir.c:424 sysfs_add_one+0x34/0xa6() (Not tainted)
Modules linked in: bridge bnep rfcomm l2cap bluetooth sunrpc ipv6 loop 
dm_multipath e1000 sg pata_acpi ata_piix button ata_generic e7xxx_edac 
iTCO_wdt i2c_i801 iTCO_vendor_support libata edac_core i2c_core pcspkr 
joydev dm_snapshot dm_zero dm_mirror dm_mod sym53c8xx scsi_transport_spi 
sd_mod scsi_mod ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd [last 
unloaded: microcode]
Pid: 1772, comm: bash Not tainted 2.6.25.11-97.fc9.i686 #1
  [<c0426bc5>] warn_on_slowpath+0x47/0x73
  [<c043a800>] ? hrtimer_start+0xca/0x141
  [<c04f3fa4>] ? vsnprintf+0x287/0x420
  [<c041c1af>] ? __wake_up_locked+0x11/0x15
  [<c061c1ae>] ? __down_trylock+0x3e/0x48
  [<c062ad0a>] ? __down_failed_trylock+0xa/0x10
  [<c04effe7>] ? ida_get_new_above+0xd0/0x171
  [<c049283d>] ? find_inode+0x1f/0x5b
  [<c04bb62c>] ? sysfs_ilookup_test+0x0/0x11
  [<c049294e>] ? ifind+0x32/0x87
  [<c04bb90e>] sysfs_add_one+0x34/0xa6
  [<c04bb4f2>] sysfs_add_file+0x45/0x6d
  [<c04bb565>] sysfs_add_file_to_group+0x4b/0x6c
  [<f885f77e>] spi_target_configure+0x3e/0x6a [scsi_transport_spi]
  [<f885f740>] ? spi_target_configure+0x0/0x6a [scsi_transport_spi]
  [<c05648d5>] transport_configure+0x18/0x1e
  [<c0564608>] attribute_container_device_trigger+0x5a/0x8e
  [<c05648bd>] ? transport_configure+0x0/0x1e
  [<c0564921>] transport_configure_device+0xd/0xf
  [<f8b24716>] __scsi_scan_target+0x554/0x56b [scsi_mod]
  [<f8b24789>] scsi_scan_channel+0x5c/0x66 [scsi_mod]
  [<f8b2486e>] scsi_scan_host_selected+0xdb/0xf6 [scsi_mod]
  [<f8b264a1>] proc_scsi_write+0x125/0x1f8 [scsi_mod]
  [<f8b2637c>] ? proc_scsi_write+0x0/0x1f8 [scsi_mod]
  [<c04b13b7>] proc_reg_write+0x5a/0x6e
  [<c04b135d>] ? proc_reg_write+0x0/0x6e
  [<c048272f>] vfs_write+0x8a/0x12e
  [<c048286c>] sys_write+0x3b/0x60
  [<c0405bf2>] syscall_call+0x7/0xb
  =======================
---[ end trace 18f117abcda53ae3 ]---
sysfs: duplicate filename 'dt' can not be created
------------[ cut here ]------------
WARNING: at fs/sysfs/dir.c:424 sysfs_add_one+0x34/0xa6() (Not tainted)
Modules linked in: bridge bnep rfcomm l2cap bluetooth sunrpc ipv6 loop 
dm_multipath e1000 sg pata_acpi ata_piix button ata_generic e7xxx_edac 
iTCO_wdt i2c_i801 iTCO_vendor_support libata edac_core i2c_core pcspkr 
joydev dm_snapshot dm_zero dm_mirror dm_mod sym53c8xx scsi_transport_spi 
sd_mod scsi_mod ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd [last 
unloaded: microcode]
Pid: 1772, comm: bash Not tainted 2.6.25.11-97.fc9.i686 #1
  [<c0426bc5>] warn_on_slowpath+0x47/0x73
  [<c043a800>] ? hrtimer_start+0xca/0x141
  [<c04f3fa4>] ? vsnprintf+0x287/0x420
  [<c041c1af>] ? __wake_up_locked+0x11/0x15
  [<c061c1ae>] ? __down_trylock+0x3e/0x48
  [<c062ad0a>] ? __down_failed_trylock+0xa/0x10
  [<c04effe7>] ? ida_get_new_above+0xd0/0x171
  [<c049283d>] ? find_inode+0x1f/0x5b
  [<c04bb62c>] ? sysfs_ilookup_test+0x0/0x11
  [<c049294e>] ? ifind+0x32/0x87
  [<c04bb90e>] sysfs_add_one+0x34/0xa6
  [<c04bb4f2>] sysfs_add_file+0x45/0x6d
  [<c04bb565>] sysfs_add_file_to_group+0x4b/0x6c
  [<f885f77e>] spi_target_configure+0x3e/0x6a [scsi_transport_spi]
  [<f885f740>] ? spi_target_configure+0x0/0x6a [scsi_transport_spi]
  [<c05648d5>] transport_configure+0x18/0x1e
  [<c0564608>] attribute_container_device_trigger+0x5a/0x8e
  [<c05648bd>] ? transport_configure+0x0/0x1e
  [<c0564921>] transport_configure_device+0xd/0xf
  [<f8b24716>] __scsi_scan_target+0x554/0x56b [scsi_mod]
  [<f8b24789>] scsi_scan_channel+0x5c/0x66 [scsi_mod]
  [<f8b2486e>] scsi_scan_host_selected+0xdb/0xf6 [scsi_mod]
  [<f8b264a1>] proc_scsi_write+0x125/0x1f8 [scsi_mod]
  [<f8b2637c>] ? proc_scsi_write+0x0/0x1f8 [scsi_mod]
  [<c04b13b7>] proc_reg_write+0x5a/0x6e
  [<c04b135d>] ? proc_reg_write+0x0/0x6e
  [<c048272f>] vfs_write+0x8a/0x12e
  [<c048286c>] sys_write+0x3b/0x60
  [<c0405bf2>] syscall_call+0x7/0xb
  =======================
---[ end trace 18f117abcda53ae3 ]---

Expected results:
Aaro is not sure if this is harmless or not.

Additional info:
[root@machine059 aakoskin]# uname -a
Linux machine059.testing.local 2.6.25.11-97.fc9.i686 #1 SMP Mon Jul 21 
01:31:09 EDT 2008 i686 i686 i386 GNU/Linux
[root@machine059 aakoskin]# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
   Vendor: FUJITSU  Model: MAW3073NP        Rev: 4701
   Type:   Direct-Access                    ANSI  SCSI revision: 03
Host: scsi1 Channel: 00 Id: 00 Lun: 00
   Vendor: FUJITSU  Model: MAW3073NP        Rev: 4701
   Type:   Direct-Access                    ANSI  SCSI revision: 03

Comment 1 Bug Zapper 2009-06-10 02:26:44 UTC
This message is a reminder that Fedora 9 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 9.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '9'.

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Comment 2 Patrick C. F. Ernzer 2009-06-16 16:17:16 UTC
just tried under F11, bug seems gone (no output in dmesg or syslog). Closing.

steps take to test:
[root@mcp61b ~]# uname -r
2.6.29.4-167.fc11.i586
[root@mcp61b ~]# cat /proc/scsi/scsi
Attached devices:
Host: scsi2 Channel: 00 Id: 00 Lun: 00
  Vendor: FUJITSU  Model: MAW3073NP        Rev: 4701
  Type:   Direct-Access                    ANSI  SCSI revision: 03
Host: scsi3 Channel: 00 Id: 00 Lun: 00
  Vendor: FUJITSU  Model: MAW3073NP        Rev: 4701
  Type:   Direct-Access                    ANSI  SCSI revision: 03
[root@mcp61b ~]# echo "scsi add-single-device 2 0 0 0">/proc/scsi/scsi