Messages in this thread | | | Date | Wed, 17 Dec 2003 17:25:49 -0500 (EST) | From | "Richard B. Johnson" <> | Subject | Re: ext3 file system |
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On Wed, 17 Dec 2003, jshankar wrote:
> Hello, > > Does the ext3 file systems have to wait for the acknowledgement of block of > data written to the SCSI device before writing the next block of data. >
No. Many SCSI drives and adapters allow queued commands and disconnect operation.
> Is there a parallel I/O where the file system goes on writing the block of > data > without waiting for the acknowledgement. >
This is the normal mode of operation.
> Please let me know your opinion. > > Thanks > Jayshankar >
Normal Unix/Linux file-systems write data to RAM. At some unknown time, when memory gets tight, some data are written to the device.
Basically with Unix/Linux, you are using a RAM-Disk that overflows to the physical media. There are special file-systems (journaling) that guarantee that something, enough to recover the data, is written at periodic intervals.
Cheers, Dick Johnson Penguin : Linux version 2.4.22 on an i686 machine (797.90 BogoMips). Note 96.31% of all statistics are fiction.
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