A 1TB
logical drive rebuild for RAID 5 can take an average of 32 hours.
In 1997
Logical Operations and The Cobb Group were renamed ZD Education and ZD Journals, respectively.
Superficial advice might suggest that it is important for leaders to remain coldly
logical in assessing the opportunities before them and making choices that are in their best interests.
Because they think in
logical connections and numbers, individuals who possess thinking smarts earned top grades in science and math and learn best when they can assemble the information they need in a
logical fashion.
I will explain why the formal-structural view is neutral with regard to the apriority of logic, and I will show that this neutrality neither prevents it from capturing the intuitive notion of
logical consequence nor renders it inconsistent.
These switches have specialized port-level processors (frequently optimized ASICs, but also could be FPGAs or network processors) that inspect and redirect I/O (translate from
logical to physical addresses) at wire-speed.
Although businesses have long realized the necessity of smart card-based physical access control, the adoption of smart card-based
logical access control is occurring at a slower rate.
In a typical IP SAN configuration, the backup software instructs client servers to send backup data to
logical volumes presented by a storage-provisioning appliance over a dedicated Gigabit Ethernet SAN.
Using an SRM tool, it can assess and classify all the stored data at the
logical level.
For example, DataCore's SANsymphony software makes the allocation of
logical volumes to specific servers a simple and intuitive activity using the drag-and-drop GUI.
In the early 1980s, several disk storage suppliers offered disk subsystems that had multiple
logical disk images on a single physical disk drive.
Two nodes with redundant I/O ports (Host Bus Adapters--HBAs) are connected to dual active controllers via redundant switches and four RAID-protected
logical volumes are connected to redundant controllers over redundant back-end fibre loops.
These imperatives are predicated on one simple fact: that storage has evolved into a
logical function within an enterprise, not just a physical one.
