3.4 – Given a scenario, select, install and configure storage devices Flashcards
How much data can an SATA Revision 3.0 drive transfer per second? ❍ A. 50 MB/s ❍ B. 90 MB/s ❍ C. 1969 MB/s ❍ D. 6 Gb/s ❍ E. 16 Gb/s
D. SATA Revision 3.0 drives can transfer 6 Gb/s, which after encoding amounts to
600 MB/s. SATA Revision 3.2 is 16 Gb/s (1969 MB/s) but requires SATA Express
or M.2. 50 MB/s is a typical write speed for Blu-ray discs and some flash media.
90 MB/s is a typical write speed for an SD card.
Which level of RAID stripes data and parity across three or more disks? ❍ A. RAID 0 ❍ B. RAID 1 ❍ C. RAID 5 ❍ D. Striping ❍ E. RAID 10
C. RAID 5 stripes data and parity across three or more disks. RAID 0 does not
stripe parity; it stripes data only and can use two disks or more. RAID 1 uses two
disks only. Striping is another name for RAID 0. RAID 10 contains two sets of mirrored disks that are then striped.
Which of the following has the largest potential for storage capacity? ❍ A. CD-R ❍ B. CD-RW ❍ C. DVD-RW ❍ D. Blu-ray
D. Blu-ray, at a typical maximum of 50 GB, has the largest storage capacity. CDs
top out just under 1 GB. DVDs have a maximum of 17 GB.
A customer complains that an important disc is stuck in the computer’s
DVD-ROM drive. What should you recommend to the customer?
❍ A. To get a screwdriver and disassemble the drive
❍ B. To format the disc
❍ C. To use a paper clip to eject the tray
❍ D. To dispose of the drive and replace the media
C. Tell the customer to use a paper clip to eject the DVD-ROM tray. Disassembling
the drive is not necessary; the customer shouldn’t be told to do this. If the disc is
rewritable, formatting it would erase the contents, even if you could format in this
scenario. Never tell a customer to dispose of a DVD-ROM drive; they rarely fail.
Which of the following best describes a specification for accessing storage while using PCI Express? ❍ A. NVMe ❍ B. 7200 RPM ❍ C. Hot-swappable ❍ D. 3.5-inch and 2.5-inch
A. Non-Volatile Memory Express (NVMe) is a specification for accessing storage
while using PCI Express. Essentially, the M.2 slot on a motherboard taps into
the PCI Express bus (×4) and uses a portion of the total bandwidth associated
with that bus. The platters in a hard disk drive (HDD) rotate at a certain speed.
For example, 7200 RPM is common; other typical speeds include 5400 RPM
and 10,000 RPM. Hot-swappable capability is when drives can be removed and
inserted while the system is on. SATA-based hard drives come in two main widths:
3.5-inch and 2.5-inch. The 3.5-inch drive is used in desktop computers, networkattached storage, and other larger devices. The 2.5-inch drive is used in laptops
and other smaller devices.
