from dmesg:
libata version 2.21 loaded.
device-mapper: ioctl: 4.11.0-ioctl (2006-10-12) initialised: dm-devel@redhat.com
PCI: Enabling device 0000:03:00.1 (0000 -> 0001)
ACPI: PCI Interrupt 0000:03:00.1[B] -> GSI 17 (level, low) -> IRQ 17
PCI: Setting latency timer of device 0000:03:00.1 to 64
scsi0 : pata_jmicron
scsi1 : pata_jmicron
ata1: PATA max UDMA/100 cmd 0x0001cc00 ctl 0x0001c882 bmdma 0x0001c400 irq 17
ata2: PATA max UDMA/100 cmd 0x0001c800 ctl 0x0001c482 bmdma 0x0001c408 irq 17
ata1.00: ATAPI: LITE-ON DVDRW SOHW-1693S, KS0B, max UDMA/66
ata1.01: ATAPI: IOMEGA  ZIP 100       ATAPI, 05.H, max MWDMA1, CDB intr
ata1.00: configured for UDMA/66
ata1.01: configured for MWDMA1
scsi 0:0:0:0: CD-ROM            LITE-ON  DVDRW SOHW-1693S KS0B PQ: 0 ANSI: 5
scsi 0:0:1:0: Direct-Access     IOMEGA   ZIP 100          05.H PQ: 0 ANSI: 5
sd 0:0:1:0: [sda] 196608 512-byte hardware sectors (101 MB)
sd 0:0:1:0: [sda] Write Protect is off
sd 0:0:1:0: [sda] Mode Sense: 00 40 00 00
sd 0:0:1:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sd 0:0:1:0: [sda] 196608 512-byte hardware sectors (101 MB)
sd 0:0:1:0: [sda] Write Protect is off
sd 0:0:1:0: [sda] Mode Sense: 00 40 00 00
sd 0:0:1:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
 sda:<6>sd 0:0:1:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
sd 0:0:1:0: [sda] Sense Key : Hardware Error [current]
sd 0:0:1:0: [sda] Add. Sense: Scsi parity error
end_request: I/O error, dev sda, sector 0
Buffer I/O error on device sda, logical block 0

If a disk is inserted into the drive (/var/log/messages)
Dec 10 14:22:53 localhost kernel: sd 0:0:1:0: [sda] Spinning up disk.....<5>sd 0:0:1:0: [sda] Spinning up disk....ready
Dec 10 14:22:53 localhost kernel: sd 0:0:1:0: [sda] 196608 512-byte hardware sectors (101 MB)
Dec 10 14:22:53 localhost kernel: sd 0:0:1:0: [sda] Write Protect is off
Dec 10 14:22:53 localhost kernel: sd 0:0:1:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Dec 10 14:22:53 localhost kernel: sd 0:0:1:0: [sda] 196608 512-byte hardware sectors (101 MB)
Dec 10 14:22:53 localhost kernel: sd 0:0:1:0: [sda] Write Protect is off
Dec 10 14:22:53 localhost kernel: sd 0:0:1:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Dec 10 14:22:53 localhost kernel:  sda:<6>sd 0:0:1:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
Dec 10 14:22:53 localhost kernel: sd 0:0:1:0: [sda] Sense Key : Hardware Error [current]
Dec 10 14:22:53 localhost kernel: sd 0:0:1:0: [sda] Add. Sense: Scsi parity error
Dec 10 14:22:53 localhost kernel: end_request: I/O error, dev sda, sector 0
Dec 10 14:22:53 localhost kernel: printk: 42 messages suppressed.
Dec 10 14:22:53 localhost kernel: Buffer I/O error on device sda, logical block 0