Here it comes:

ls -l /dev/disk/by-id /sys/block

/dev/disk/by-id:
insgesamt 0
lrwxrwxrwx 1 root root  9 2010-09-14 09:08 ata-SAMSUNG_HD502HI_S1VZJ9DSA00758 -> ../../sda
lrwxrwxrwx 1 root root 10 2010-09-14 09:08 ata-SAMSUNG_HD502HI_S1VZJ9DSA00758-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 2010-09-14 09:08 ata-SAMSUNG_HD502HI_S1VZJ9DSA00758-part2 -> ../../sda2
lrwxrwxrwx 1 root root 10 2010-09-14 09:08 ata-SAMSUNG_HD502HI_S1VZJ9DSA00758-part5 -> ../../sda5
lrwxrwxrwx 1 root root  9 2010-09-14 09:08 scsi-SATA_SAMSUNG_HD502HIS1VZJ9DSA00758 -> ../../sda
lrwxrwxrwx 1 root root 10 2010-09-14 09:08 scsi-SATA_SAMSUNG_HD502HIS1VZJ9DSA00758-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 2010-09-14 09:08 scsi-SATA_SAMSUNG_HD502HIS1VZJ9DSA00758-part2 -> ../../sda2
lrwxrwxrwx 1 root root 10 2010-09-14 09:08 scsi-SATA_SAMSUNG_HD502HIS1VZJ9DSA00758-part5 -> ../../sda5
lrwxrwxrwx 1 root root  9 2010-09-14 09:17 usb-Apple_iPod_000A2700105C956C-0:0 -> ../../sdf
lrwxrwxrwx 1 root root  9 2010-09-14 09:08 usb-USB2.0_CardReader_CF_606569746801-0:0 -> ../../sdb
lrwxrwxrwx 1 root root  9 2010-09-14 09:08 usb-USB2.0_CardReader_MS_606569746801-0:2 -> ../../sdd
lrwxrwxrwx 1 root root  9 2010-09-14 09:08 usb-USB2.0_CardReader_SD_606569746801-0:3 -> ../../sde
lrwxrwxrwx 1 root root  9 2010-09-14 09:08 usb-USB2.0_CardReader_SM_XD_606569746801-0:1 -> ../../sdc
lrwxrwxrwx 1 root root  9 2010-09-14 09:08 wwn-0x50024e92011d69c1 -> ../../sda
lrwxrwxrwx 1 root root 10 2010-09-14 09:08 wwn-0x50024e92011d69c1-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 2010-09-14 09:08 wwn-0x50024e92011d69c1-part2 -> ../../sda2
lrwxrwxrwx 1 root root 10 2010-09-14 09:08 wwn-0x50024e92011d69c1-part5 -> ../../sda5

/sys/block:
insgesamt 0
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 fd0 -> ../devices/platform/floppy.0/block/fd0
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 loop0 -> ../devices/virtual/block/loop0
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 loop1 -> ../devices/virtual/block/loop1
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 loop2 -> ../devices/virtual/block/loop2
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 loop3 -> ../devices/virtual/block/loop3
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 loop4 -> ../devices/virtual/block/loop4
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 loop5 -> ../devices/virtual/block/loop5
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 loop6 -> ../devices/virtual/block/loop6
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 loop7 -> ../devices/virtual/block/loop7
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram0 -> ../devices/virtual/block/ram0
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram1 -> ../devices/virtual/block/ram1
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram10 -> ../devices/virtual/block/ram10
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram11 -> ../devices/virtual/block/ram11
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram12 -> ../devices/virtual/block/ram12
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram13 -> ../devices/virtual/block/ram13
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram14 -> ../devices/virtual/block/ram14
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram15 -> ../devices/virtual/block/ram15
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram2 -> ../devices/virtual/block/ram2
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram3 -> ../devices/virtual/block/ram3
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram4 -> ../devices/virtual/block/ram4
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram5 -> ../devices/virtual/block/ram5
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram6 -> ../devices/virtual/block/ram6
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram7 -> ../devices/virtual/block/ram7
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram8 -> ../devices/virtual/block/ram8
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 ram9 -> ../devices/virtual/block/ram9
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 sda -> ../devices/pci0000:00/0000:00:0f.0/host3/target3:0:0/3:0:0:0/block/sda
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 sdb -> ../devices/pci0000:00/0000:00:10.4/usb1/1-5/1-5:1.0/host4/target4:0:0/4:0:0:0/block/sdb
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 sdc -> ../devices/pci0000:00/0000:00:10.4/usb1/1-5/1-5:1.0/host4/target4:0:0/4:0:0:1/block/sdc
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 sdd -> ../devices/pci0000:00/0000:00:10.4/usb1/1-5/1-5:1.0/host4/target4:0:0/4:0:0:2/block/sdd
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 sde -> ../devices/pci0000:00/0000:00:10.4/usb1/1-5/1-5:1.0/host4/target4:0:0/4:0:0:3/block/sde
lrwxrwxrwx 1 root root 0 2010-09-14 09:17 sdf -> ../devices/pci0000:00/0000:00:10.4/usb1/1-8/1-8:1.0/host5/target5:0:0/5:0:0:0/block/sdf
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 sr0 -> ../devices/pci0000:00/0000:00:0f.1/host1/target1:0:0/1:0:0:0/block/sr0
lrwxrwxrwx 1 root root 0 2010-09-14 09:09 sr1 -> ../devices/pci0000:00/0000:00:0f.0/host2/target2:0:0/2:0:0:0/block/sr1