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SubjectPROBLEM: drivers/scsi/sd.c - Incorrect Reporting of Blocks and Capacity of Large SCSI Disk Arrays
Date
I have attempt to fill out the Bug Report as per REPORTING-BUGS. I have 
attempted to forward the report to the respective authors of the appropriate
module but the email bounced (-> ericy@andante.org, drew@colorado.edu).
Please let me know if I can be of further assistance.

Regards,

James

1. drivers/scsi/sd.c - Incorrect Reporting of Blocks and Capacity of Large
SCSI Disk Arrays

2. The size of very large SCSI Disk arrays is incorrectly reported by code
in 'drivers/scsi/sd.c' as a result of perhaps inadequate precision of field
'capacity' in structure: 'typedef struct scsi_disk' found in drives/scsi/sd.h.

This problem exists on both a custom 2.4.20 kernel and on a stock RedHat
2.4.18-19.8.0smp kernel. This problem report pertains to the latter kernel.

For example:

SCSI device sdb: -562247552 512-byte hdwr sectors (4294679426 MB)
sdb: sdb1
SCSI device sdc: -1997908992 512-byte hdwr sectors (76582 MB)
sdc: sdc1

Server:
IBM xSeries 220 (2 x PIII 1Ghz, 512MB RAM)
HBAs:
Onboard Adaptec HBA to 1 x 36GB HDD
Offboard Adaptec AHA39160 HBA in slot 4 (64-bit/33Mhz)
Channels:
Channel A connected to Adaptec Durstor 6220SS
Channel B connected to Quantum ATL 1500 (2 x SDLT320, 20-slots)
Storage:
Adaptec Durstor 6220SS Connected to 3 Adaptec 312R JBODs
Each JBOD populated with 8 x 147GB Fujitsu HDD (MAP3147NC)
RAID:
RAID-3 Array 1 created comprising 14 x HDD (@ 140201MB per spindle)
RAID-3 Array 2 created comprising 9 x HDD (@ 140201MB per spindle)
Spares:
One pool spare allocated
Array Capacity
Total unformatted capacity for Array 1: 1962814MB (1916.81GB, 1.87TB)
Total unformatted capacity for Array 2: 1261809MB (1232.23GB, 1.20TB)
Partition
Array 1: Single Partition
Array 2: Single Partition
FileSystem:
Array 1: EXT3
Array 2: EXT3

3. scsi, modules, kernel

4. Linux version 2.4.18-19.8.0smp (bhcompile@stripples.devel.redhat.com) (gcc
version 3.2 20020903 (Red Hat Linux 8.0 3.2-7)) #1 SMP Thu Dec 12 04:36:25
EST 2002

5. From dmesg:

SCSI subsystem driver Revision: 1.00
scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.8
<Adaptec aic7892 Ultra160 SCSI adapter>
aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs

scsi1 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.8
<Adaptec 3960D Ultra160 SCSI adapter>
aic7899: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs

scsi2 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.8
<Adaptec 3960D Ultra160 SCSI adapter>
aic7899: Ultra160 Wide Channel B, SCSI Id=7, 32/253 SCBs

blk: queue c251a618, I/O limit 4095Mb (mask 0xffffffff)
Vendor: IBM-PSG Model: DDYS-T36950M M Rev: S9HA
Type: Direct-Access ANSI SCSI revision: 03
blk: queue c251a418, I/O limit 4095Mb (mask 0xffffffff)
Vendor: IBM Model: YGLv3 S2 Rev: 0
Type: Processor ANSI SCSI revision: 02
blk: queue dfd1be18, I/O limit 4095Mb (mask 0xffffffff)
scsi0:A:0:0: Tagged Queuing enabled. Depth 253
blk: queue dfd1be18, I/O limit 4095Mb (mask 0xffffffff)
Vendor: Adaptec Model: DuraStor 6200S Rev: L421
Type: Direct-Access ANSI SCSI revision: 03
blk: queue dfd01218, I/O limit 4095Mb (mask 0xffffffff)
scsi1:A:1:0: Tagged Queuing enabled. Depth 253
blk: queue dfd01218, I/O limit 4095Mb (mask 0xffffffff)
Vendor: M4 DATA Model: MagFile Rev: 3.01
Type: Medium Changer ANSI SCSI revision: 02
blk: queue dfce5818, I/O limit 4095Mb (mask 0xffffffff)
Vendor: QUANTUM Model: SDLT320 Rev: 2E2E
Type: Sequential-Access ANSI SCSI revision: 02
blk: queue dfce5418, I/O limit 4095Mb (mask 0xffffffff)
Vendor: QUANTUM Model: SDLT320 Rev: 2E2E
Type: Sequential-Access ANSI SCSI revision: 02
blk: queue dfce5018, I/O limit 4095Mb (mask 0xffffffff)
Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
Attached scsi disk sdb at scsi1, channel 0, id 1, lun 0
(scsi0:A:0): 160.000MB/s transfers (80.000MHz DT, offset 63, 16bit)
SCSI device sda: 71096640 512-byte hdwr sectors (36401 MB)
Partition check:
sda: sda1 sda2 sda3
(scsi1:A:1): 160.000MB/s transfers (80.000MHz DT, offset 127, 16bit)
SCSI device sdb: -562247552 512-byte hdwr sectors (-287870 MB)

6. N/a

7. Environment

7.1 Software

ver_linux:

Linux firedaemon 2.4.18-19.8.0smp #1 SMP Thu Dec 12 04:36:25 EST 2002 i686
i686 i386 GNU/Linux

Gnu C 3.2
Gnu make 3.79.1
util-linux 2.11r
mount 2.11r
modutils 2.4.18
e2fsprogs 1.27
jfsutils 1.0.17
reiserfsprogs 3.6.2
pcmcia-cs 3.1.31
PPP 2.4.1
isdn4k-utils 3.1pre4
Linux C Library 2.2.93
Dynamic linker (ldd) 2.2.93
Procps 2.0.7
Net-tools 1.60
Kbd 1.06
Sh-utils 2.0.12
Modules Loaded sg nfsd lockd sunrpc sk98lin e100 iptable_filter
ip_tables st mousedev keybdev hid input usb-ohci usbcore ext3 jbd aic7xxx
sd_mod scsi_mod

7.2 Processor Info

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 10
cpu MHz : 999.753
cache size : 256 KB
Physical processor ID : 0
Number of siblings : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 mmx fxsr sse
bogomips : 1985.67

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 10
cpu MHz : 999.753
cache size : 256 KB
Physical processor ID : 0
Number of siblings : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 mmx fxsr sse
bogomips : 1997.32

7.3 Modules

sg 37644 0 (autoclean)
nfsd 81424 8 (autoclean)
lockd 58800 1 (autoclean) [nfsd]
sunrpc 84604 1 (autoclean) [nfsd lockd]
sk98lin 138624 1
e100 64596 1
iptable_filter 2412 0 (autoclean) (unused)
ip_tables 15640 1 [iptable_filter]
st 31440 0 (unused)
mousedev 5688 1
keybdev 2976 0 (unused)
hid 22404 0 (unused)
input 6240 0 [mousedev keybdev hid]
usb-ohci 22088 0 (unused)
usbcore 80512 1 [hid usb-ohci]
ext3 72960 3
jbd 56752 3 [ext3]
aic7xxx 138452 4
sd_mod 13552 8
scsi_mod 110408 4 [sg st aic7xxx sd_mod]

7.4 Loaded Driver/Hardware Info

0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
01f0-01f7 : ide0
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(auto)
0700-070f : ServerWorks OSB4 IDE Controller
0700-0707 : ide0
0708-070f : ide1
0cf8-0cff : PCI conf1
2200-223f : Intel Corp. 82557/8/9 [Ethernet Pro 100]
2200-223f : e100
2300-23ff : Adaptec AIC-7892P U160/m
2400-24ff : Adaptec AHA-3960D / AIC-7899A U160/m
2500-25ff : Adaptec AHA-3960D / AIC-7899A U160/m (#2)
2600-26ff : Syskonnect (Schneider & Koch) Gigabit Ethernet

00000000-0009dbff : System RAM
0009dc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000ca000-000ce7ff : Extension ROM
000f0000-000fffff : System ROM
00100000-1ffebc3f : System RAM
00100000-0026af59 : Kernel code
0026af5a-00375f03 : Kernel data
1ffebc40-1ffeffff : ACPI Tables
1fff0000-1fffffff : reserved
efff8000-efffbfff : Syskonnect (Schneider & Koch) Gigabit Ethernet
efffd000-efffdfff : Adaptec AHA-3960D / AIC-7899A U160/m (#2)
efffd000-efffdfff : aic7xxx
efffe000-efffefff : Adaptec AHA-3960D / AIC-7899A U160/m
efffe000-efffefff : aic7xxx
effff000-efffffff : Adaptec AIC-7892P U160/m
effff000-efffffff : aic7xxx
f0000000-f7ffffff : S3 Inc. Savage 4
fea00000-feafffff : Intel Corp. 82557/8/9 [Ethernet Pro 100]
fea00000-feafffff : e100
feb7e000-feb7efff : ServerWorks OSB4/CSB5 OHCI USB Controller
feb7e000-feb7efff : usb-ohci
feb7f000-feb7ffff : Intel Corp. 82557/8/9 [Ethernet Pro 100]
feb7f000-feb7ffff : e100
feb80000-febfffff : S3 Inc. Savage 4
fec00000-ffffffff : reserved

7.5 PCI Information

00:00.0 Host bridge: ServerWorks CNB20LE Host Bridge (rev 06)
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR+ FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR-
Latency: 64, cache line size 08

00:00.1 Host bridge: ServerWorks CNB20LE Host Bridge (rev 06)
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+
Stepping- SERR+ FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 64, cache line size 08

00:01.0 VGA compatible controller: S3 Inc. Savage 4 (rev 04) (prog-if 00
[VGA])
Subsystem: IBM: Unknown device 01c5
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 248 (1000ns min, 63750ns max), cache line size 08
Interrupt: pin A routed to IRQ 0
Region 0: Memory at feb80000 (32-bit, non-prefetchable) [size=512K]
Region 1: Memory at f0000000 (32-bit, prefetchable) [size=128M]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: [dc] Power Management version 1
Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-
,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:02.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 08)
Subsystem: IBM Netfinity 10/100
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr-
Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (2000ns min, 14000ns max), cache line size 08
Interrupt: pin A routed to IRQ 27
Region 0: Memory at feb7f000 (32-bit, non-prefetchable) [size=4K]
Region 1: I/O ports at 2200 [size=64]
Region 2: Memory at fea00000 (32-bit, non-prefetchable) [size=1M]
Expansion ROM at <unassigned> [disabled] [size=1M]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA PME
(D0+,D1+,D2+,D3hot+,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=2 PME-

00:0f.0 ISA bridge: ServerWorks OSB4 South Bridge (rev 50)
Subsystem: ServerWorks OSB4 South Bridge
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR+ FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0

00:0f.1 IDE interface: ServerWorks OSB4 IDE Controller (prog-if 8a [Master
SecP PriP])
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR+ FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 64
Region 4: I/O ports at 0700 [size=16]

00:0f.2 USB Controller: ServerWorks OSB4/CSB5 USB Controller (rev 04) (prog-
if 10 [OHCI])
Subsystem: ServerWorks OSB4/CSB5 USB Controller
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr-
Stepping- SERR+ FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (20000ns max), cache line size 08
Interrupt: pin A routed to IRQ 9
Region 0: Memory at feb7e000 (32-bit, non-prefetchable) [size=4K]

01:03.0 SCSI storage controller: Adaptec AIC-7892P U160/m (rev 02)
Subsystem: Adaptec AIC-7892P U160/m
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr+
Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (10000ns min, 6250ns max), cache line size 08
Interrupt: pin A routed to IRQ 28
BIST result: 00
Region 0: I/O ports at 2300 [disabled] [size=256]
Region 1: Memory at effff000 (64-bit, non-prefetchable) [size=4K]
Expansion ROM at <unassigned> [disabled] [size=128K]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-
,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

01:06.0 SCSI storage controller: Adaptec AHA-3960D / AIC-7899A U160/m (rev 01)
Subsystem: Adaptec AHA-3960D U160/m
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr+
Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (10000ns min, 6250ns max), cache line size 08
Interrupt: pin A routed to IRQ 22
BIST result: 00
Region 0: I/O ports at 2400 [disabled] [size=256]
Region 1: Memory at efffe000 (64-bit, non-prefetchable) [size=4K]
Expansion ROM at <unassigned> [disabled] [size=128K]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-
,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

01:06.1 SCSI storage controller: Adaptec AHA-3960D / AIC-7899A U160/m (rev 01)
Subsystem: Adaptec AHA-3960D U160/m
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr+
Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (10000ns min, 6250ns max), cache line size 08
Interrupt: pin B routed to IRQ 23
BIST result: 00
Region 0: I/O ports at 2500 [disabled] [size=256]
Region 1: Memory at efffd000 (64-bit, non-prefetchable) [size=4K]
Expansion ROM at <unassigned> [disabled] [size=128K]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-
,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

01:07.0 Ethernet controller: Syskonnect (Schneider & Koch) Gigabit Ethernet
(rev 12)
Subsystem: Syskonnect (Schneider & Koch) SK-9843 (1000Base-SX single
link)
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr+
Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (5750ns min, 7750ns max), cache line size 08
Interrupt: pin A routed to IRQ 24
Region 0: Memory at efff8000 (32-bit, non-prefetchable) [size=16K]
Region 1: I/O ports at 2600 [size=256]
Expansion ROM at <unassigned> [disabled] [size=128K]
Capabilities: [48] Power Management version 1
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-
,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=1 PME-
Capabilities: [50] Vital Product Data

7.6 SCSI Information

Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: IBM-PSG Model: DDYS-T36950M M Rev: S9HA
Type: Direct-Access ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 08 Lun: 00
Vendor: IBM Model: YGLv3 S2 Rev: 0
Type: Processor ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 01 Lun: 00
Vendor: Adaptec Model: DuraStor 6200S Rev: L421
Type: Direct-Access ANSI SCSI revision: 03
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: M4 DATA Model: MagFile Rev: 3.01
Type: Medium Changer ANSI SCSI revision: 02
Host: scsi2 Channel: 00 Id: 01 Lun: 00
Vendor: QUANTUM Model: SDLT320 Rev: 2E2E
Type: Sequential-Access ANSI SCSI revision: 02
Host: scsi2 Channel: 00 Id: 02 Lun: 00
Vendor: QUANTUM Model: SDLT320 Rev: 2E2E
Type: Sequential-Access ANSI SCSI revision: 02

7.7 N/a




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