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Nirsoft has another get free utility called BlueScreenView, which can be downloaded here. BlueScreenView will generate a table listing information about the times in the past that your PC has crashed. It scans minidump files to get this information.
A minidump contains memory for a single process.
Recently I got some bad advice from an Apple Genius at the Apple Store near the Plaza Hotel in Manhattan. He advised me that I should let my battery run down to 5% or lower as often as possible in order to maximize the battery life. This is not the way to get the most out of your iPhone's lithium battery.
Apple makes clear on its official site, that, "There’s no need to let it discharge 100% before recharging. Apple lithium-ion batteries work in charge cycles. You complete one charge cycle when you’ve used (discharged) an amount that equals 100% of your battery’s capacity — but not necessarily all from one charge." Xfinity, Comcast's, internet, cable and telephone service, explains on its mobile phone information site, that phones using nickel ion batteries had a memory charge problem that required a full charge to be depleted so each section of the battery could be continuously used. Phones with lithium batteries should not be fully discharged each day. "[I]f you let your battery drain completely every day, it will last 500 days. If you charge it before it drains and top it off throughout the day, you’ll stretch out the time those 500 charges will last."
A Popular Science article recommends letting the battery life go down to only about 50% per cent before recharging and avoiding recharging fully. "Shallow discharges and recharges are better than full ones, because they put less stress on the battery, so it lasts longer."
Battery University provides detailed research into this issue. "If at all possible, avoid full discharges and charge the battery more often between uses." The lower the discharge percentage, the higher the number of discharge cycles.
RAID stands for Redundant Array of Independent Disks - this fun acronym refers to digital storage units which use multiple disk drives to improve performance or for data redundancy. Keep in mind that this means that RAID units are designed to operate faster and ensure that data is available if a drive fails. It does not mean that a single RAID unit operates as a back-up archive. A RAID unit will not account for problems when files are corrupted or deleted. So if a file on one of the RAID disks is deleted, it will be automatically removed from the mirrored disks in the same unit.
There are several different kinds of RAID configurations, and they are each assigned a number.
RAID 0 - employs striping to distribute the contents of a file evenly across the multiple disks in a RAID unit. This lets concurrent read or write operations run more quickly, but if one disk fails, the entire volume is lost.
RAID 1 - does not use striping - so each file is entirely on one disk, but there are redundant copies of the file on the other disks, so if one disk fails, the data can be recalled from one of the others. The problem is that data can only be written at the speed of the slowest drive since all of the drives must be updated.
RAID 2 - in this configuration, the spindles on each drive are synchronized, and each sequential bit of a file is stored on a different drive. This is a largely obsolete configuration, and is not used on any newly manufactured RAID units.
RAID 3 - in this configuration the spindles are also synchronized, but the data for a file is spread across drives at the byte level. RAID 3 is very rarely used.
RAID 4 - this configuration uses block striping - a block usually being 512 KB. [8 bits in a byte].
RAID 5 - The data is distributed so that if one drive fails, the data can be assembled from the others. A minimum of three drives are required. It also uses block level striping.
RAID 6 - like RAID 5 this also uses block striping, but allows for recovery even if two drives fail, and requires a minimum of four drives.