Guralp Systems CMG-DCM build <10,000 User Manual
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Acquisition Modules and Platinum Firmware
Recording and Retrieving Data
Force unsafe rename: The recording system takes considerable care to avoid
data loss in the event of power disconnection or storage device removal.
When the storage device is formatted as a FAT32 volume, part of this care
involves a “safe rename” routine, which takes a little time to complete. When
the power budget is particularly tight, this extra time costs extra power as the
storage device needs to be powered up for longer. Ticking this check-box
disables the safe rename routine, reducing the amount of time for which the
storage device needs to be powered at the cost of increased vulnerability to
power outages or unexpected storage device disconnection.
UID and GID: When recording to an NFS or ext4 volume, files are normally
written as user “root” and group “root”. If this is undesirable, another user ID
and/or group ID can be specified using these two fields.
11.2.2 File name escape sequences
Escape sequences (tokens) are used in the “File name” fields in the MiniSEED
and GCF recording configuration pages. The escape sequences all begin with
a percent character ('%') and are used to insert variable data such as the date
or stream name into the file or directory name; each escape sequence is
replaced with the relevant value. Any non-escape sequence characters are
copied verbatim into the name, as are unrecognised escape sequences. All
numbers are decimal and will have leading zeroes added to fill the required
number of digits, where appropriate.
The available escape sequences are listed below. Items marked † only have
values in GCF context and will be replaced by the relevant number of spaces
if used with miniSEED. Items marked ‡ only have values in miniSEED
context:
%d
2 digit day of month (01-31)
%H
2 digit hour in 24 hour clock (00-23)
%j
3 digit Julian day
%m
2 digit month (01-12)
%M
2 digit minute (00-59)
%y
2 digit year i.e. without century digits (00-99)
%Y
4 digit year
%S
GCF System ID †
%C
GCF Stream ID †
%s
5 char SEED station identifier (spaces are removed from
all SEED Ids) ‡
%c
3 char SEED channel identifier ‡
%n
2 char SEED network identifier ‡
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Issue E - February 2014